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Conner SJ, Guarin JR, Le TT, Fatherree JP, Kelley C, Payne SL, Parker SR, Bloomer H, Zhang C, Salhany K, McGinn RA, Henrich E, Yui A, Srinivasan D, Borges H, Oudin MJ. Cell morphology best predicts tumorigenicity and metastasis in vivo across multiple TNBC cell lines of different metastatic potential. Breast Cancer Res 2024; 26:43. [PMID: 38468326 PMCID: PMC10929179 DOI: 10.1186/s13058-024-01796-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 02/26/2024] [Indexed: 03/13/2024] Open
Abstract
BACKGROUND Metastasis is the leading cause of death in breast cancer patients. For metastasis to occur, tumor cells must invade locally, intravasate, and colonize distant tissues and organs, all steps that require tumor cell migration. The majority of studies on invasion and metastasis rely on human breast cancer cell lines. While it is known that these cells have different properties and abilities for growth and metastasis, the in vitro morphological, proliferative, migratory, and invasive behavior of these cell lines and their correlation to in vivo behavior is poorly understood. Thus, we sought to classify each cell line as poorly or highly metastatic by characterizing tumor growth and metastasis in a murine model of six commonly used human triple-negative breast cancer xenografts, as well as determine which in vitro assays commonly used to study cell motility best predict in vivo metastasis. METHODS We evaluated the liver and lung metastasis of human TNBC cell lines MDA-MB-231, MDA-MB-468, BT549, Hs578T, BT20, and SUM159 in immunocompromised mice. We characterized each cell line's cell morphology, proliferation, and motility in 2D and 3D to determine the variation in these parameters between cell lines. RESULTS We identified MDA-MB-231, MDA-MB-468, and BT549 cells as highly tumorigenic and metastatic, Hs578T as poorly tumorigenic and metastatic, BT20 as intermediate tumorigenic with poor metastasis to the lungs but highly metastatic to the livers, and SUM159 as intermediate tumorigenic but poorly metastatic to the lungs and livers. We showed that metrics that characterize cell morphology are the most predictive of tumor growth and metastatic potential to the lungs and liver. Further, we found that no single in vitro motility assay in 2D or 3D significantly correlated with metastasis in vivo. CONCLUSIONS Our results provide an important resource for the TNBC research community, identifying the metastatic potential of 6 commonly used cell lines. Our findings also support the use of cell morphological analysis to investigate the metastatic potential and emphasize the need for multiple in vitro motility metrics using multiple cell lines to represent the heterogeneity of metastasis in vivo.
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Affiliation(s)
- Sydney J Conner
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Justinne R Guarin
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Thanh T Le
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Jackson P Fatherree
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Charlotte Kelley
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Samantha L Payne
- Department of Biomedical Sciences, University of Guelph, 50 Stone Rd E, Guelph, ON, Canada
| | - Savannah R Parker
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Hanan Bloomer
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Crystal Zhang
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Kenneth Salhany
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Rachel A McGinn
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Emily Henrich
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Anna Yui
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Deepti Srinivasan
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Hannah Borges
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA
| | - Madeleine J Oudin
- Department of Biomedical Engineering, Tufts University, 200 College Ave, Medford, MA, 02155, USA.
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Mathimani T, Le TT, Salmen SH, Ali Alharbi S, Jhanani GK. Process optimization of one-step direct transesterification and dual-step extraction-transesterification of the Chlorococcum-Nannochloropsis consortium for biodiesel production. Environ Res 2024; 240:117580. [PMID: 37925129 DOI: 10.1016/j.envres.2023.117580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 10/27/2023] [Accepted: 11/01/2023] [Indexed: 11/06/2023]
Abstract
In the present study, the efficacy of one-step direct transesterification (OSDT) and Dual-step extraction-transesterification (DSET) of Chlorococcum sp., Nannochloropsis sp., and their consortium was evaluated for fatty acid methyl ester (FAME) yield. Initially, the biomass yield and lipid content of the two strains and their consortium were estimated. Of the biomasses, the consortium showed a higher biomass yield of 1.41 g/L and lipid content of 30.2%, which is higher than the monocultures irrespective of the different biomass drying methods used. With regards to the FAME yield, OSDT and DSET have yielded almost similar quantities about 21 g/100g dried biomass. Of the different reaction conditions of OSDT tested, a higher FAME yield at 70-71% (based on lipid weight) was obtained at 75 °C reaction temperature, 3 h reaction time with a 2g sample size. Eventually, the fatty acid composition of consortium biomass revealed higher levels of saturated and monounsaturated fatty acids in the vicinity of 46 and 25%, respectively. Based on the results, it is concluded that OSDT is a promising method due to its low energy consumption, cost-effective and time-saving attributes for quality biodiesel production from the Chlorococcum-Nannochloropsis consortium.
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Affiliation(s)
- Thangavel Mathimani
- Institute of Research and Development, Duy Tan University, Da Nang, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, Viet Nam.
| | - T T Le
- Institute of Research and Development, Duy Tan University, Da Nang, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, Viet Nam
| | - Saleh H Salmen
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box -2455, Riyadh, 11451, Saudi Arabia
| | - Sulaiman Ali Alharbi
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box -2455, Riyadh, 11451, Saudi Arabia
| | - G K Jhanani
- Institute of Technology and Business in České Budějovice, Faculty of Technology, České Budějovice, Czech Republic
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Bharathi D, Lee J, F Albeshr M, Fahad Alrefaei A, Le TT, Mathimani T. Enhanced photocatalytic degradation of polycyclic aromatic hydrocarbon by graphitic carbonitride-nickel (g-C 3N 4-Ni) nanocomposite. Chemosphere 2023; 345:140464. [PMID: 37852378 DOI: 10.1016/j.chemosphere.2023.140464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 10/03/2023] [Accepted: 10/14/2023] [Indexed: 10/20/2023]
Abstract
The objective of the present study is to synthesize g-C3N4-Ni nanocomposites composed of graphitic carbon nitride and magnetic nickel nanoparticles for benzopyrene degradation, which is one of the most potent polycyclic aromatic hydrocarbons (PAH) molecules. The concocted g-C3N4-Ni nanocomposites contained confined nanospheres with a mean particle dimension of 22 nm. Batch adsorption studies revealed that a rise in adsorbent dosage elevates benzopyrene degradation percentage in both water and soil samples with respect to time. The increase in the benzopyrene concentration did not have much influence on the degradation efficiency, and hence, the minimal concentration of PAH molecule is essential for the effective adsorption by g-C3N4-Ni nanocomposites. The rise in pH tends to increase the degradation of Benzopyrene till 3 h of the incubation period, and beyond 3 h, the degradation percentage declines. With regard to the effect of light source, UV light has been shown to accelerate the degradation of benzopyrene by g-C3N4-Ni nanocomposites than sunlight. The adsorption kinetic and isotherm investigations have proven that the Pseudo-second order kinetic model and Freundlich isotherm model were appropriate for our study. Thus, the g-C3N4-Ni nanocomposites were found to be efficient as a photocatalyst for the adsorption of benzopyrene from environmental samples.
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Affiliation(s)
- Devaraj Bharathi
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
| | - Mohammed F Albeshr
- Department of Zoology, College of Sciences, King Saud University, P.O. Box. 2455, Riyadh, 11451, Saudi Arabia
| | - Abdulwahed Fahad Alrefaei
- Department of Zoology, College of Sciences, King Saud University, P.O. Box. 2455, Riyadh, 11451, Saudi Arabia
| | - T T Le
- Institute of Research and Development, Duy Tan University, Da Nang, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, Viet Nam
| | - Thangavel Mathimani
- Institute of Research and Development, Duy Tan University, Da Nang, Viet Nam; School of Engineering and Technology, Duy Tan University, Da Nang, Viet Nam.
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Tran NT, Phan TNT, Pham TT, Le TT, Le HM, Nguyen DT, Lam AN, Pham TT, Le HT, Dang NB, Tran KC, Tran VD. Urban-rural disparities in acceptance of human papillomavirus vaccination among women in Can Tho, Vietnam. Ann Ig 2023; 35:641-659. [PMID: 37313797 DOI: 10.7416/ai.2023.2575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Background In Vietnam, cervical cancer is a significant public health concern for women. Unfortunately, despite the availability of the HPV vaccine, low vaccination rates persist. Objectives This study investigates the discrepancy between urban and rural areas in the willingness to receive HPV vaccination with or without fees. Methods A cross-sectional study was conducted on a sample of 648 women aged between 15 and 49, living in two urban and two rural Vietnamese districts of Can Tho, between May and December 2021. Results The overall vaccination rate was 4%, with urban women having a higher rate of 4.9% compared to rural women at 3.1%. Among unvaccinated women, those from rural areas expressed a significantly higher desire to receive the free vaccine (91.4%) than urban women (84.4%). However, the intention to vaccinate declined when rural women and urban women were advised to pay the cost (63.4% and 57.1%, respectively). A strong correlation was found between a positive attitude and intention for vaccination, irrespective of its price or free availability. Education and access to information about the HPV vaccine were also identified as the most significant factors influencing the intention to vaccination among urban and rural women. Conclusion The low HPV vaccination rates among women aged 15-49 living in both urban and rural regions of Vietnam are a notable public health concern. These outcomes emphasize the critical need for effective programs of vaccine laterization, as an introduction to the offer of affordable and accessible HPV vaccines for women in Can Tho, Vietnam.
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Affiliation(s)
- N T Tran
- Department of Environment and Occupational Health, Faculty of Public Health, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - T N T Phan
- Department of Environment and Occupational Health, Faculty of Public Health, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - T T Pham
- Department of Nutrition and Food Safety, Faculty of Public Health, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - T T Le
- Department of Environment and Occupational Health, Faculty of Public Health, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - H M Le
- Department of Epidemiology, Faculty of Public Health, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - D T Nguyen
- Department of Biostatistics and Demography, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - A N Lam
- Department of Epidemiology, Faculty of Public Health, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - T T Pham
- Department of Health Organization and Management, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - H T Le
- Department of Health Organization and Management, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
| | - N B Dang
- Pharmaceutical Biotechnology, Faculty of Pharmacy, Dong Thap Medical College, Dong Thap, Vietnam
| | - K C Tran
- Science in Pharmacy, Faculty of Pharmacy, Dong Thap Medical College, Dong Thap, Vietnam
| | - V D Tran
- Department of Health Organization and Management, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
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Conner S, Guarin JR, Le TT, Fatherree J, Kelley C, Payne S, Salhany K, McGinn R, Henrich E, Yui A, Parker S, Srinivasan D, Bloomer H, Borges H, Oudin MJ. Cell morphology best predicts tumorigenicity and metastasis in vivo across multiple TNBC cell lines of different metastatic potential. bioRxiv 2023:2023.06.14.544969. [PMID: 37398306 PMCID: PMC10312673 DOI: 10.1101/2023.06.14.544969] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Background Metastasis is the leading cause of death in breast cancer patients. For metastasis to occur, tumor cells must invade locally, intravasate, and colonize distant tissues and organs, all steps that require tumor cell migration. The majority of studies on invasion and metastasis rely on human breast cancer cell lines. While it is known that these cells have different properties and abilities for growth and metastasis, the in vitro morphological, proliferative, migratory, and invasive behavior of these cell lines and their correlation to in vivo behavior is poorly understood. Thus, we sought to classify each cell line as poorly or highly metastatic by characterizing tumor growth and metastasis in a murine model of six commonly used human triple-negative breast cancer xenografts, as well as determine which in vitro assays commonly used to study cell motility best predict in vivo metastasis. Methods We evaluated the liver and lung metastasis of human TNBC cell lines MDA-MB-231, MDA-MB-468, BT549, Hs578T, BT20, and SUM159 in immunocompromised mice. We characterized each cell line's cell morphology, proliferation, and motility in 2D and 3D to determine the variation in these parameters between cell lines. Results We identified MDA-MB-231, MDA-MB-468, and BT549 cells as highly tumorigenic and metastatic, Hs578T as poorly tumorigenic and metastatic, BT20 as intermediate tumorigenic with poor metastasis to the lungs but highly metastatic to the livers, and SUM159 as intermediate tumorigenic but poorly metastatic to the lungs and livers. We showed that metrics that characterize cell morphology are the most predictive of tumor growth and metastatic potential to the lungs and liver. Further, we found that no single in vitro motility assay in 2D or 3D significantly correlated with metastasis in vivo. Conclusions Our results provide an important resource for the TNBC research community, identifying the metastatic potential of 6 commonly used cell lines. Our findings also support the use of cell morphological analysis to investigate the metastatic potential and emphasize the need for multiple in vitro motility metrics using multiple cell lines to represent the heterogeneity of metastasis in vivo.
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Affiliation(s)
- Sydney Conner
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Justinne R. Guarin
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Thanh T. Le
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | | | - Charlotte Kelley
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Samantha Payne
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Ken Salhany
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Rachel McGinn
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Emily Henrich
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Anna Yui
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Savannah Parker
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Deepti Srinivasan
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Hanan Bloomer
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Hannah Borges
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
| | - Madeleine J. Oudin
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, USA
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Le TT, Oudin MJ. Understanding and modeling nerve-cancer interactions. Dis Model Mech 2023; 16:dmm049729. [PMID: 36621886 PMCID: PMC9844229 DOI: 10.1242/dmm.049729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The peripheral nervous system plays an important role in cancer progression. Studies in multiple cancer types have shown that higher intratumoral nerve density is associated with poor outcomes. Peripheral nerves have been shown to directly regulate tumor cell properties, such as growth and metastasis, as well as affect the local environment by modulating angiogenesis and the immune system. In this Review, we discuss the identity of nerves in organs in the periphery where solid tumors grow, the known mechanisms by which nerve density increases in tumors, and the effects these nerves have on cancer progression. We also discuss the strengths and weaknesses of current in vitro and in vivo models used to study nerve-cancer interactions. Increased understanding of the mechanisms by which nerves impact tumor progression and the development of new approaches to study nerve-cancer interactions will facilitate the discovery of novel treatment strategies to treat cancer by targeting nerves.
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Affiliation(s)
- Thanh T. Le
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford, MA 02155, USA
| | - Madeleine J. Oudin
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford, MA 02155, USA
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7
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Le TT, Payne SL, Buckwald MN, Hayes LA, Parker SR, Burge CB, Oudin MJ. Sensory nerves enhance triple-negative breast cancer invasion and metastasis via the axon guidance molecule PlexinB3. NPJ Breast Cancer 2022; 8:116. [PMID: 36333352 PMCID: PMC9636220 DOI: 10.1038/s41523-022-00485-z] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022] Open
Abstract
In breast cancer, nerve presence has been correlated with more invasive disease and worse prognosis, yet the mechanisms by which different types of peripheral nerves drive tumor progression remain poorly understood. In this study, we identified sensory nerves as more abundant in human triple-negative breast cancer (TNBC) tumors. Co-injection of sensory neurons isolated from the dorsal root ganglia (DRG) of adult female mice with human TNBC cells in immunocompromised mice increased the number of lung metastases. Direct in vitro co-culture of human TNBC cells with the dorsal root ganglia (DRG) of adult female mice revealed that TNBC cells adhere to sensory neuron fibers leading to an increase in migration speed. Species-specific RNA sequencing revealed that co-culture of TNBC cells with sensory nerves upregulates the expression of genes associated with cell migration and adhesion in cancer cells. We demonstrated that lack of the semaphorin receptor PlexinB3 in cancer cells attenuate their adhesion to and migration on sensory nerves. Together, our results identify a mechanism by which nerves contribute to breast cancer migration and metastasis by inducing a shift in TNBC cell gene expression and support the rationale for disrupting neuron-cancer cell interactions to target metastasis.
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Affiliation(s)
- Thanh T Le
- Department of Biomedical Engineering, Tufts University, 200 College Avenue, Medford, MA, 02155, USA
| | - Samantha L Payne
- Department of Biomedical Engineering, Tufts University, 200 College Avenue, Medford, MA, 02155, USA
| | - Maia N Buckwald
- Department of Biomedical Engineering, Tufts University, 200 College Avenue, Medford, MA, 02155, USA
| | - Lily A Hayes
- Department of Biomedical Engineering, Tufts University, 200 College Avenue, Medford, MA, 02155, USA
| | - Savannah R Parker
- Department of Biomedical Engineering, Tufts University, 200 College Avenue, Medford, MA, 02155, USA
| | | | - Madeleine J Oudin
- Department of Biomedical Engineering, Tufts University, 200 College Avenue, Medford, MA, 02155, USA.
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Nguyen HL, Bui QT, Tran HV, Hoang MV, Le TT, Ha DA, Nguyen VT, Nguyen ND, Tran HH, Goldberg RJ. Characteristics, in-hospital management, and complications of acute myocardial infarction in northern and Central Vietnam. Int J Cardiol 2022; 364:133-138. [PMID: 35716944 DOI: 10.1016/j.ijcard.2022.06.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 02/05/2022] [Accepted: 06/12/2022] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Contemporary data on the epidemiology of acute myocardial infarction (AMI) in Vietnam are extremely limited. METHODS We established population-based registries of residents from 2 provinces in a northern urban (Hai Phong), and a central rural (Thanh Hoa), province of Vietnam hospitalized with a validated first AMI in 2018. We described patient characteristics, in-hospital management and clinical complications, and estimated incidence rates of AMI in these two registries. RESULTS A total of 785 patients (mean age = 71.2 years, 64.7% men) were admitted to the two hospitals with a validated first AMI. Approximately 64% of the AMI cases were ST-segment-elevation AMI. Patients from Thanh Hoa compared with Hai Phong were more likely to delay seeking acute hospital care. The incidence rates (per 100,000 population) of initial AMI in Thanh Hoa and Hai Phong were 16 and 30, respectively. Most patients were treated with aspirin (Thanh Hoa: 96%; Hai Phong: 90%) and statins (both provinces: 91%) during their hospitalization. A greater proportion of patients in Hai Phong (69%) underwent percutaneous revascularization than those in Thanh Hoa (58%). The most common in-hospital complications were heart failure (both provinces:12%), cardiogenic shock (Thanh Hoa: 10%; Hai phong: 7%); and cardiac arrest (both provinces: 9%). The in-hospital case-fatality rates for patients from Thanh Hoa and Hai Phong were 6.8% and 3.8%, respectively. CONCLUSIONS The incidence and hospital case-fatality rates of AMI were low in two Vietnamese provinces. Extent of pre-hospital delay and in-hospital use of evidence-based therapies were suboptimal, being more prominent in the rural province.
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Affiliation(s)
- Hoa L Nguyen
- Department of Population and Quantitative Health Sciences, University of Massachusetts Chan Medical School, Worcester, MA, USA.
| | - Quyen T Bui
- Hanoi University of Public Health, Hanoi, Viet Nam
| | - Hoang V Tran
- Yale New Haven Health-Bridgeport Hospital, New Haven, CT, USA
| | - Minh V Hoang
- Hanoi University of Public Health, Hanoi, Viet Nam
| | - Thanh T Le
- Vinmec Healthcare System, Hanoi, Viet Nam
| | - Duc A Ha
- Vietnam Ministry of Health, Hanoi, Viet Nam
| | - Van T Nguyen
- Hanoi University of Public Health, Hanoi, Viet Nam
| | | | | | - Robert J Goldberg
- Department of Population and Quantitative Health Sciences, University of Massachusetts Chan Medical School, Worcester, MA, USA
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Payne SL, Ram P, Srinivasan DH, Le TT, Levin M, Oudin MJ. Potassium channel-driven bioelectric signalling regulates metastasis in triple-negative breast cancer. EBioMedicine 2022; 75:103767. [PMID: 34933180 PMCID: PMC8688589 DOI: 10.1016/j.ebiom.2021.103767] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 11/22/2021] [Accepted: 12/06/2021] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND There is a critical need to better understand the mechanisms that drive local cell invasion and metastasis to develop new therapeutics targeting metastatic disease. Bioelectricity is an important mediator of cellular processes and changes in the resting membrane potential (RMP) are associated with increased cancer cell invasion. However, whether the RMP can be used to target invading cancer cells is unknown. METHODS We employed both genetic and pharmacological manipulation of potassium channel activity and characterized the effects on breast cancer cell migration and invasion in vitro, and metastasis in an animal model of breast cancer. FINDINGS Our data demonstrate that altering the RMP of triple-negative breast cancer (TNBC) cells by manipulating potassium channel expression increases in vitro invasion, in vivo tumour growth and metastasis, and is accompanied by changes in gene expression associated with cell adhesion. INTERPRETATION We describe a novel mechanism for RMP-mediated cell migration involving cadherin-11 and the MAPK pathway. Importantly, we identify a new strategy to target metastatic TNBC in vivo by repurposing an FDA-approved potassium channel blocker. Our results demonstrate that bioelectricity regulates cancer cell invasion and metastasis which could lead to a new class of therapeutics for patients with metastatic disease. FUNDING This work was supported by the National Institutes of Health (R00-CA207866 to M.J.O.), Tufts University (Start-up funds from the School of Engineering to M.J.O., Tufts Collaborates Award to M.J.O. and M.L.), Allen Discovery centre program (Paul G. Allen Frontiers Group (12,171) to M.L.), and Breast Cancer Alliance Young Investigator Grant to M.J.O, Laidlaw Scholar funding to D.S. M.L. also gratefully acknowledges support of the Barton Family Foundation.
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Affiliation(s)
- Samantha L Payne
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, United States of America
| | - Priyanka Ram
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, United States of America
| | - Deepti H Srinivasan
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, United States of America
| | - Thanh T Le
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, United States of America
| | - Michael Levin
- Allen Discovery Center, 200 College Avenue, Tufts University, Medford, MA 02155, United States of America
| | - Madeleine J Oudin
- Department of Biomedical Engineering, 200 College Avenue, Tufts University, Medford MA 02155, United States of America.
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10
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Vallejo-Vaz AJ, Stevens CA, Lyons AR, Dharmayat KI, Freiberger T, Hovingh GK, Mata P, Raal FJ, Santos RD, Soran H, Watts GF, Abifadel M, Aguilar-Salinas CA, Alhabib KF, Alkhnifsawi M, Almahmeed W, Alnouri F, Alonso R, Al-Rasadi K, Al-Sarraf A, Al-Sayed N, Araujo F, Ashavaid TF, Banach M, Béliard S, Benn M, Binder CJ, Bogsrud MP, Bourbon M, Chlebus K, Corral P, Davletov K, Descamps OS, Durst R, Ezhov M, Gaita D, Genest J, Groselj U, Harada-Shiba M, Holven KB, Kayikcioglu M, Khovidhunkit W, Lalic K, Latkovskis G, Laufs U, Liberopoulos E, Lima-Martinez MM, Lin J, Maher V, Marais AD, März W, Mirrakhimov E, Miserez AR, Mitchenko O, Nawawi H, Nordestgaard BG, Panayiotou AG, Paragh G, Petrulioniene Z, Pojskic B, Postadzhiyan A, Raslova K, Reda A, Reiner Ž, Sadiq F, Sadoh WE, Schunkert H, Shek AB, Stoll M, Stroes E, Su TC, Subramaniam T, Susekov AV, Tilney M, Tomlinson B, Truong TH, Tselepis AD, Tybjærg-Hansen A, Vázquez Cárdenas A, Viigimaa M, Wang L, Yamashita S, Kastelein JJ, Bruckert E, Vohnout B, Schreier L, Pang J, Ebenbichler C, Dieplinger H, Innerhofer R, Winhofer-Stöckl Y, Greber-Platzer S, Krychtiuk K, Speidl W, Toplak H, Widhalm K, Stulnig T, Huber K, Höllerl F, Rega-Kaun G, Kleemann L, Mäser M, Scholl-Bürgi S, Säly C, Mayer FJ, Sablon G, Tarantino E, Nzeyimana C, Pojskic L, Sisic I, Nalbantic AD, Jannes CE, Pereira AC, Krieger JE, Petrov I, Goudev A, Nikolov F, Tisheva S, Yotov Y, Tzvetkov I, Baass A, Bergeron J, Bernard S, Brisson D, Brunham LR, Cermakova L, Couture P, Francis GA, Gaudet D, Hegele RA, Khoury E, Mancini GJ, McCrindle BW, Paquette M, Ruel I, Cuevas A, Asenjo S, Wang X, Meng K, Song X, Yong Q, Jiang T, Liu Z, Duan Y, Hong J, Ye P, Chen Y, Qi J, Liu Z, Li Y, Zhang C, Peng J, Yang Y, Yu W, Wang Q, Yuan H, Cheng S, Jiang L, Chong M, Jiao J, Wu Y, Wen W, Xu L, Zhang R, Qu Y, He J, Fan X, Wang Z, Chow E, Pećin I, Perica D, Symeonides P, Vrablik M, Ceska R, Soska V, Tichy L, Adamkova V, Franekova J, Cifkova R, Kraml P, Vonaskova K, Cepova J, Dusejovska M, Pavlickova L, Blaha V, Rosolova H, Nussbaumerova B, Cibulka R, Vaverkova H, Cibickova L, Krejsova Z, Rehouskova K, Malina P, Budikova M, Palanova V, Solcova L, Lubasova A, Podzimkova H, Bujdak J, Vesely J, Jordanova M, Salek T, Urbanek R, Zemek S, Lacko J, Halamkova H, Machacova S, Mala S, Cubova E, Valoskova K, Burda L, Bendary A, Daoud I, Emil S, Elbahry A, Rafla S, Sanad O, Kazamel G, Ashraf M, Sobhy M, El-Hadidy A, Shafy MA, Kamal S, Bendary M, Talviste G, Angoulvant D, Boccara F, Cariou B, Carreau V, Carrie A, Charrieres S, Cottin Y, Di-Fillipo M, Ducluzeau PH, Dulong S, Durlach V, Farnier M, Ferrari E, Ferrieres D, Ferrieres J, Gallo A, hankard R, Inamo J, Lemale J, Moulin P, Paillard F, Peretti N, Perrin A, Pradignac A, Rabes JP, Rigalleau V, Sultan A, Schiele F, Tounian P, Valero R, Verges B, Yelnik C, Ziegler O, Haack IA, Schmidt N, Dressel A, Klein I, Christmann J, Sonntag A, Stumpp C, Boger D, Biedermann D, Usme MM, Beil FU, Klose G, König C, Gouni-Berthold I, Otte B, Böll G, Kirschbaum A, Merke J, Scholl J, Segiet T, Gebauer M, Predica F, Mayer M, Leistikow F, Füllgraf-Horst S, Müller C, Schüler M, Wiener J, Hein K, Baumgartner P, Kopf S, Busch R, Schömig M, Matthias S, Allendorf-Ostwald N, Fink B, Böhm D, Jäkel A, Koschker AC, Schweizer R, Vogt A, Parhofer K, König W, Reinhard W, Bäßler A, Stadelmann A, Schrader V, Katzmann J, Tarr A, Steinhagen-Thiessen E, Kassner U, Paulsen G, Homberger J, Zemmrich C, Seeger W, Biolik K, Deiss D, Richter C, Pantchechnikova E, Dorn E, Schatz U, Julius U, Spens A, Wiesner T, Scholl M, Rizos CV, Sakkas N, Elisaf M, Skoumas I, Tziomalos K, Rallidis L, Kotsis V, Doumas M, Athyros V, Skalidis E, Kolovou G, Garoufi A, Bilianou E, Koutagiar I, Agapakis D, Kiouri E, Antza C, Katsiki N, Zacharis E, Attilakos A, Sfikas G, Koumaras C, Anagnostis P, Anastasiou G, Liamis G, Koutsogianni AD, Karányi Z, Harangi M, Bajnok L, Audikovszky M, Márk L, Benczúr B, Reiber I, Nagy G, Nagy A, Reddy LL, Shah SA, Ponde CK, Dalal JJ, Sawhney JP, Verma IC, Altaey M, Al-Jumaily K, Rasul D, Abdalsahib AF, Jabbar AA, Al-ageedi M, Agar R, Cohen H, Ellis A, Gavishv D, Harats D, Henkin Y, Knobler H, Leavit L, Leitersdorf E, Rubinstein A, Schurr D, Shpitzen S, Szalat A, Casula M, Zampoleri V, Gazzotti M, Olmastroni E, Sarzani R, Ferri C, Repetti E, Sabbà C, Bossi AC, Borghi C, Muntoni S, Cipollone F, Purrello F, Pujia A, Passaro A, Marcucci R, Pecchioli V, Pisciotta L, Mandraffino G, Pellegatta F, Mombelli G, Branchi A, Fiorenza AM, Pederiva C, Werba JP, Parati G, Carubbi F, Iughetti L, Iannuzzi A, Iannuzzo G, Calabrò P, Averna M, Biasucci G, Zambon S, Roscini AR, Trenti C, Arca M, Federici M, Del Ben M, Bartuli A, Giaccari A, Pipolo A, Citroni N, Guardamagna O, Bonomo K, Benso A, Biolo G, Maroni L, Lupi A, Bonanni L, Zenti MG, Matsuki K, Hori M, Ogura M, Masuda D, Kobayashi T, Nagahama K, Al-Jarallah M, Radovic M, Lunegova O, Bektasheva E, Khodzhiboboev E, Erglis A, Gilis D, Nesterovics G, Saripo V, Meiere R, Upena-RozeMicena A, Terauda E, Jambart S, Khoury PE, Elbitar S, Ayoub C, Ghaleb Y, Aliosaitiene U, Kutkiene S, Kasim NA, Nor NS, Ramli AS, Razak SA, Al-Khateeb A, Kadir SH, Muid SA, Rahman TA, Kasim SS, Radzi AB, Ibrahim KS, Razali S, Ismail Z, Ghani RA, Hafidz MI, Chua AL, Rosli MM, Annamalai M, Teh LK, Razali R, Chua YA, Rosman A, Sanusi AR, Murad NA, Jamal ARA, Nazli SA, Razman AZ, Rosman N, Rahmat R, Hamzan NS, Azzopardi C, Mehta R, Martagon AJ, Ramirez GA, Villa NE, Vazquez AV, Elias-Lopez D, Retana GG, Rodriguez B, Macías JJ, Zazueta AR, Alvarado RM, Portano JD, Lopez HA, Sauque-Reyna L, Herrera LG, Mendia LE, Aguilar HG, Cooremans ER, Aparicio BP, Zubieta VM, Gonzalez PA, Ferreira-Hermosillo A, Portilla NC, Dominguez GJ, Garcia AY, Cazares HE, Gonzalez JR, Valencia CV, Padilla FG, Prado RM, De los Rios Ibarra MO, Villicaña RD, Rivera KJ, Carrera RA, Alvarez JA, Martinez JC, de los Reyes Barrera Bustillo M, Vargas GC, Chacon RC, Andrade MH, Ortega AF, Alcala HG, de Leon LE, Guzman BG, Garcia JJ, Cuellar JC, Cruz JR, Garcia AH, Almada JR, Herrera UJ, Sobrevilla FL, Rodriguez EM, Sibaja CM, Rodriguez AB, Oyervides JC, Vazquez DI, Rodriguez EA, Osorio ML, Saucedo JR, Tamayo MT, Talavera LA, Arroyo LE, Carrillo EA, Isara A, Obaseki DE, Al-Waili K, Al-Zadjali F, Al-Zakwani I, Al-Kindi M, Al-Mukhaini S, Al-Barwani H, Rana A, Shah LS, Starostecka E, Konopka A, Lewek J, Bartłomiejczyk M, Gąsior M, Dyrbuś K, Jóźwiak J, Gruchała M, Pajkowski M, Romanowska-Kocejko M, Żarczyńska-Buchowiecka M, Chmara M, Wasąg B, Parczewska A, Gilis-Malinowska N, Borowiec-Wolna J, Stróżyk A, Woś M, Michalska-Grzonkowska A, Medeiros AM, Alves AC, Silva F, Lobarinhas G, Palma I, de Moura JP, Rico MT, Rato Q, Pais P, Correia S, Moldovan O, Virtuoso MJ, Salgado JM, Colaço I, Dumitrescu A, Lengher C, Mosteoru S, Meshkov A, Ershova A, Rozkova T, Korneva V, Yu KT, Zafiraki V, Voevoda M, Gurevich V, Duplyakov D, Ragino Y, Safarova M, Shaposhnik I, Alkaf F, Khudari A, Rwaili N, Al-Allaf F, Alghamdi M, Batais MA, Almigbal TH, Kinsara A, AlQudaimi AH, Awan Z, Elamin OA, Altaradi H, Rajkovic N, Popovic L, Singh S, Stosic L, Rasulic I, Lalic NM, Lam C, Le TJ, Siang EL, Dissanayake S, I-Shing JT, Shyong TE, Jin TC, Balinth K, Buganova I, Fabryova L, Kadurova M, Klabnik A, Kozárová M, Sirotiakova J, Battelino T, Kovac J, Mlinaric M, Sustar U, Podkrajsek KT, Fras Z, Jug B, Cevc M, Pilcher GJ, Blom D, Wolmarans K, Brice B, Muñiz-Grijalvo O, Díaz-Díaz JL, de Isla LP, Fuentes F, Badimon L, Martin F, Lux A, Chang NT, Ganokroj P, Akbulut M, Alici G, Bayram F, Can LH, Celik A, Ceyhan C, Coskun FY, Demir M, Demircan S, Dogan V, Durakoglugil E, Dural IE, Gedikli O, Hacioglu A, Ildizli M, Kilic S, Kirilmaz B, Kutlu M, Oguz A, Ozdogan O, Onrat E, Ozer S, Sabuncu T, Sahin T, Sivri F, Sonmez A, Temizhan A, Topcu S, Tuncez A, Vural M, Yenercag M, Yesilbursa D, Yigit Z, Yildirim AB, Yildirir A, Yilmaz MB, Atallah B, Traina M, Sabbour H, Hay DA, Luqman N, Elfatih A, Abdulrasheed A, Kwok S, Oca ND, Reyes X, Alieva RB, Kurbanov RD, Hoshimov SU, Nizamov UI, Ziyaeva AV, Abdullaeva GJ, Do DL, Nguyen MN, Kim NT, Le TT, Le HA, Tokgozoglu L, Catapano AL, Ray KK. Global perspective of familial hypercholesterolaemia: a cross-sectional study from the EAS Familial Hypercholesterolaemia Studies Collaboration (FHSC). Lancet 2021; 398:1713-1725. [PMID: 34506743 DOI: 10.1016/s0140-6736(21)01122-3] [Citation(s) in RCA: 117] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/06/2021] [Accepted: 05/11/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND The European Atherosclerosis Society Familial Hypercholesterolaemia Studies Collaboration (FHSC) global registry provides a platform for the global surveillance of familial hypercholesterolaemia through harmonisation and pooling of multinational data. In this study, we aimed to characterise the adult population with heterozygous familial hypercholesterolaemia and described how it is detected and managed globally. METHODS Using FHSC global registry data, we did a cross-sectional assessment of adults (aged 18 years or older) with a clinical or genetic diagnosis of probable or definite heterozygous familial hypercholesterolaemia at the time they were entered into the registries. Data were assessed overall and by WHO regions, sex, and index versus non-index cases. FINDINGS Of the 61 612 individuals in the registry, 42 167 adults (21 999 [53·6%] women) from 56 countries were included in the study. Of these, 31 798 (75·4%) were diagnosed with the Dutch Lipid Clinic Network criteria, and 35 490 (84·2%) were from the WHO region of Europe. Median age of participants at entry in the registry was 46·2 years (IQR 34·3-58·0); median age at diagnosis of familial hypercholesterolaemia was 44·4 years (32·5-56·5), with 40·2% of participants younger than 40 years when diagnosed. Prevalence of cardiovascular risk factors increased progressively with age and varied by WHO region. Prevalence of coronary disease was 17·4% (2·1% for stroke and 5·2% for peripheral artery disease), increasing with concentrations of untreated LDL cholesterol, and was about two times lower in women than in men. Among patients receiving lipid-lowering medications, 16 803 (81·1%) were receiving statins and 3691 (21·2%) were on combination therapy, with greater use of more potent lipid-lowering medication in men than in women. Median LDL cholesterol was 5·43 mmol/L (IQR 4·32-6·72) among patients not taking lipid-lowering medications and 4·23 mmol/L (3·20-5·66) among those taking them. Among patients taking lipid-lowering medications, 2·7% had LDL cholesterol lower than 1·8 mmol/L; the use of combination therapy, particularly with three drugs and with proprotein convertase subtilisin-kexin type 9 inhibitors, was associated with a higher proportion and greater odds of having LDL cholesterol lower than 1·8 mmol/L. Compared with index cases, patients who were non-index cases were younger, with lower LDL cholesterol and lower prevalence of cardiovascular risk factors and cardiovascular diseases (all p<0·001). INTERPRETATION Familial hypercholesterolaemia is diagnosed late. Guideline-recommended LDL cholesterol concentrations are infrequently achieved with single-drug therapy. Cardiovascular risk factors and presence of coronary disease were lower among non-index cases, who were diagnosed earlier. Earlier detection and greater use of combination therapies are required to reduce the global burden of familial hypercholesterolaemia. FUNDING Pfizer, Amgen, Merck Sharp & Dohme, Sanofi-Aventis, Daiichi Sankyo, and Regeneron.
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11
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Chin C, Le TT, Singh G, Yip J, Chai SC, Yong QW, Lee E, Yeo D, Tay E, Goh PP, Ling LF, Richards AM, Delgado V, Ding ZP, Ling LH. Echocardiographic global longitudinal strain as a marker of myocardial fibrosis predicts outcomes in aortic stenosis. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Left ventricular global longitudinal strain (LV-GLS) by speckle tracking echocardiography (STE) reflects intrinsic myocardial function, influenced by interstitial abnormalities. Cardiovascular magnetic resonance (CMR) detects myocardial fibrosis non-invasively, but it is limited for widespread use. We aim to establish LV-GLS as a marker of replacement myocardial fibrosis on CMR and validate the prognostic value of LV-GLS thresholds associated with fibrosis.
Methods
LV-GLS thresholds of replacement fibrosis were established in the derivation cohort: 151 patients (57±10 years; 58% males) with hypertension who underwent STE to measure LV-GLS and CMR for replacement myocardial fibrosis. Prognostic value of the thresholds was validated in a separate outcome cohort: 261 patients with moderate-severe aortic stenosis (AS; 71±12 years; 58% males; NYHA functional class I-II) and preserved LVEF ≥50%. Primary outcome was a composite of cardiovascular mortality, heart failure hospitalization, myocardial infarction and cerebrovascular events.
Results
In the derivation cohort, LV-GLS demonstrated good discrimination (c-statistics 0.74; 95% confidence interval: 0.66–0.83; P<0.001) and calibration (Hosmer-Lemeshow X2=6.37; P=0.605) for replacement fibrosis. In the outcome cohort, 52 events occurred over 16 [3.1, 42.0] months of follow-up. Patients with LV-GLS >−15.0% (corresponding to 95% specificity to rule-in myocardial fibrosis) had the worst outcomes compared to patients with LV-GLS <−21.0% (corresponding to 95% sensitivity to rule-out myocardial fibrosis) and those between −21.0 and −15.0% (log-rank P<0.001; Figure 1). Furthermore, LV-GLS offered independent prognostic value over clinical variables, AS severity, echocardiographic LVEF and E/e' (hazard ratio 1.18; 95% confidence interval: 1.07 to 1.30; P=0.001).
Conclusions
LV-GLS thresholds associated with replacement myocardial fibrosis is a novel approach to risk-stratify patients with AS and preserved LVEF (Figure 2).
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): National Medical Research Council Figure 1Figure 2
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Affiliation(s)
- C Chin
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - T T Le
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - G Singh
- Leiden University Medical Center, Department of Cardiology, Leiden, Netherlands (The)
| | - J Yip
- National University Heart Centre, Singapore, Singapore
| | - S C Chai
- Changi General Hospital, Singapore, Singapore
| | - Q W Yong
- Tan Tock Seng Hospital, Singapore, Singapore
| | - E Lee
- Tan Tock Seng Hospital, Singapore, Singapore
| | - D Yeo
- Apex Heart Center, Singapore, Singapore
| | - E Tay
- Asian Heart and Vascular Center, Singapore, Singapore
| | - P P Goh
- Asian Heart and Vascular Center, Singapore, Singapore
| | - L F Ling
- Khoo Teck Puat Hospital, Singapore, Singapore
| | - A M Richards
- National University Heart Centre, Singapore, Singapore
| | - V Delgado
- Leiden University Medical Center, Department of Cardiology, Leiden, Netherlands (The)
| | - Z P Ding
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - L H Ling
- National University Heart Centre, Singapore, Singapore
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12
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Perreault LR, Le TT, Oudin MJ, Black LD. RNA sequencing indicates age-dependent shifts in the cardiac fibroblast transcriptome between fetal, neonatal, and adult developmental ages. Physiol Genomics 2021; 53:414-429. [PMID: 34281425 PMCID: PMC8560366 DOI: 10.1152/physiolgenomics.00074.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 07/16/2021] [Indexed: 11/22/2022] Open
Abstract
Cardiac fibroblasts are responsible for extracellular matrix turnover and repair in the cardiac environment and serve to help facilitate immune responses. However, it is well established that they have a significant phenotypic heterogeneity with respect to location, physiological conditions, and developmental age. The goal of this study was to provide an in-depth transcriptomic profile of cardiac fibroblasts derived from rat hearts at fetal, neonatal, and adult developmental ages to ascertain variations in gene expression that may drive functional differences in these cells at these specific stages of development. We performed RNA sequencing (RNA-seq) of cardiac fibroblasts isolated from fetal, neonatal, and adult rats and compared with the rat genome. Principal component analysis of RNA-seq data suggested that data variance was predominantly due to developmental age. Differential expression and gene set enrichment analysis against Gene Ontology and Kyoto Encyclopedia of Genes and Genomes datasets indicated an array of differences across developmental ages, including significant decreases in cardiac development and cardiac function-associated genes with age and a significant increase in immune- and inflammatory-associated functions, particularly immune cell signaling and cytokine and chemokine production, with respect to increasing developmental age. These results reinforce established evidence of diverse phenotypic heterogeneity of fibroblasts with respect to developmental age. Furthermore, based on our analysis of gene expression, age-specific alterations in cardiac fibroblasts may play a crucial role in observed differences in cardiac inflammation and immune response observed across developmental ages.
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Affiliation(s)
- Luke R Perreault
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
| | - Thanh T Le
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
| | - Madeleine J Oudin
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
- Cellular, Molecular, and Developmental Biology Program, Tufts Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts
| | - Lauren D Black
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
- Cellular, Molecular, and Developmental Biology Program, Tufts Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts
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13
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Ha DA, Tran OT, Nguyen HL, Chiriboga G, Goldberg RJ, Phan VH, Nguyen CT, Nguyen GH, Pham HV, Nguyen TT, Le TT, Allison JJ. Conquering hypertension in Vietnam-solutions at grassroots level: study protocol of a cluster randomized controlled trial. Trials 2020; 21:985. [PMID: 33246495 PMCID: PMC7694904 DOI: 10.1186/s13063-020-04917-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 11/18/2020] [Indexed: 12/30/2022] Open
Abstract
Background Vietnam has been experiencing an epidemiologic transition to that of a lower-middle income country with an increasing prevalence of non-communicable diseases. The key risk factors for cardiovascular disease (CVD) are either on the rise or at alarming levels in Vietnam, particularly hypertension (HTN). Inasmuch, the burden of CVD will continue to increase in the Vietnamese population unless effective prevention and control measures are put in place. The objectives of the proposed project are to evaluate the implementation and effectiveness of two multi-faceted community and clinic-based strategies on the control of elevated blood pressure (BP) among adults in Vietnam via a cluster randomized trial design. Methods Sixteen communities will be randomized to either an intervention (8 communities) or a comparison group (8 communities). Eligible and consenting adult study participants with HTN (n = 680) will be assigned to intervention/comparison status based on the community in which they reside. Both comparison and intervention groups will receive a multi-level intervention modeled after the Vietnam National Hypertension Program including education and practice change modules for health care providers, accessible reading materials for patients, and a multi-media community awareness program. In addition, the intervention group only will receive three carefully selected enhancements integrated into routine clinical care: (1) expanded community health worker services, (2) home BP self-monitoring, and (3) a “storytelling intervention,” which consists of interactive, literacy-appropriate, and culturally sensitive multi-media storytelling modules for motivating behavior change through the power of patients speaking in their own voices. The storytelling intervention will be delivered by DVDs with serial installments at baseline and at 3, 6, and 9 months after trial enrollment. Changes in BP will be assessed in both groups at several follow-up time points. Implementation outcomes will be assessed as well. Discussion Results from this full-scale trial will provide health policymakers with practical evidence on how to combat a key risk factor for CVD using a feasible, sustainable, and cost-effective intervention that could be used as a national program for controlling HTN in Vietnam. Trial registration ClinicalTrials.gov NCT03590691. Registered on July 17, 2018. Protocol version: 6. Date: August 15, 2019.
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Affiliation(s)
- Duc A Ha
- Ministry of Health, Hanoi, Vietnam.,Health Strategy and Policy Institute, Hanoi, Vietnam
| | - Oanh T Tran
- Health Strategy and Policy Institute, Hanoi, Vietnam
| | - Hoa L Nguyen
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, 55 N Lake Ave, Worcester, MA, 01655, USA.
| | - Germán Chiriboga
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, 55 N Lake Ave, Worcester, MA, 01655, USA
| | - Robert J Goldberg
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, 55 N Lake Ave, Worcester, MA, 01655, USA
| | - Van H Phan
- Health Strategy and Policy Institute, Hanoi, Vietnam
| | - Cuc T Nguyen
- Health Strategy and Policy Institute, Hanoi, Vietnam
| | | | - Hien V Pham
- Health Strategy and Policy Institute, Hanoi, Vietnam
| | | | - Thanh T Le
- National Heart Institute, Hanoi, Vietnam.,Vinmec Healthcare System, Hanoi, Vietnam
| | - Jeroan J Allison
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, 55 N Lake Ave, Worcester, MA, 01655, USA
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14
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Blatnik AJ, McGovern VL, Le TT, Iyer CC, Kaspar BK, Burghes AHM. Conditional deletion of SMN in cell culture identifies functional SMN alleles. Hum Mol Genet 2020; 29:3477-3492. [PMID: 33075805 DOI: 10.1093/hmg/ddaa229] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/01/2020] [Accepted: 10/12/2020] [Indexed: 12/31/2022] Open
Abstract
Spinal muscular atrophy (SMA) is caused by mutation or deletion of survival motor neuron 1 (SMN1) and retention of SMN2 leading to SMN protein deficiency. We developed an immortalized mouse embryonic fibroblast (iMEF) line in which full-length wild-type Smn (flwt-Smn) can be conditionally deleted using Cre recombinase. iMEFs lacking flwt-Smn are not viable. We tested the SMA patient SMN1 missense mutation alleles A2G, D44V, A111G, E134K and T274I in these cells to determine which human SMN (huSMN) mutant alleles can function in the absence of flwt-Smn. All missense mutant alleles failed to rescue survival in the conditionally deleted iMEFs. Thus, the function lost by these mutations is essential to cell survival. However, co-expression of two different huSMN missense mutants can rescue iMEF survival and small nuclear ribonucleoprotein (snRNP) assembly, demonstrating intragenic complementation of SMN alleles. In addition, we show that a Smn protein lacking exon 2B can rescue iMEF survival and snRNP assembly in the absence of flwt-Smn, indicating exon 2B is not required for the essential function of Smn. For the first time, using this novel cell line, we can assay the function of SMN alleles in the complete absence of flwt-Smn.
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Affiliation(s)
- Anton J Blatnik
- Ohio State Biochemistry Program.,Biological Chemistry & Pharmacology
| | | | | | | | - Brian K Kaspar
- Center for Gene Therapy, Nationwide Children's Hospital; Department of Pediatrics, College of Medicine and Public Health, The Ohio State University; and Department of Neuroscience, The Ohio State University, Columbus, OH 43210, USA
| | - Arthur H M Burghes
- Ohio State Biochemistry Program.,Biological Chemistry & Pharmacology.,Molecular Genetics.,Department of Neurology, The Ohio State University Wexner Medical Center, Columbus OH 43210 USA
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15
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Le TT, Bryant J, Ang B, Su B, Cook S, Chin CALVIN. P962 The Remodeling Index risk stratifies patients with hypertensive left ventricular hypertrophy. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
National Medical Research Council
BACKGROUND
Hypertensive left ventricular hypertrophy (LVH) is associated with increased cardiovascular events. The authors previously developed the Remodeling Index (RI) that incorporated LV volume and wall-thickness in a single measure of advanced hypertrophy in hypertensive patients.
PURPOSE
This study examined the mechanisms and prognostic potential of the RI in reference with current LVH classifications.
METHODS
Cardiovascular magnetic resonance (CMR) was performed in 400 asymptomatic hypertensive patients. The newly derived RI ([(EDV)^1/3]/t; where EDV is LV end-diastolic volume and t is the maximal wall thickness across 16 myocardial segments) stratified hypertensive patients into 3 groups: without LVH, LVH with normal RI (LVH_Normal-RI) and LVH with low RI (LVH_Low-RI). The primary outcome was a composite of all-cause mortality, acute coronary syndromes, strokes and decompensated heart failure.
RESULTS
LVH_Low-RI was associated with increased LV mass index, fibrosis burden, impaired myocardial function and elevated biochemical markers of myocardial injury and wall stress. Over 18.3 ± 7.0 months (601.3 patient-years), patients with LVH_Low-RI had more than a 5-fold increase in adverse events compared to those with LVH_Normal-RI (11.6 events/100patient-years versus 2.0 events/100 patient-years, respectively; log-rank P < 0.001; Figure A). The RI provided incremental prognostic value over and above a model consisting of clinical variables and LVH (P = 0.02). Conversely concentric and eccentric LVH were associated with adverse prognosis (4.5 events/100patient-years versus 6.0 events/100patient-years, respectively; log-rank P = 0.62) that was similar as the natural history of hypertensive LVH (5.1 events/100patient-years).
CONCLUSIONS
The RI provides mechanistic insights and prognostic value that improves risk-stratification of hypertensive LVH.
Abstract P962 Figure.
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Affiliation(s)
- T T Le
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - J Bryant
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - B Ang
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - B Su
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - S Cook
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - CALVIN Chin
- National Heart Centre Singapore (NHCS), Singapore, Singapore
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16
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Phua AIH, Tara SW, Le TT, Bryant JA, Toh DFK, Ang BWY, Su B, Cook SA, Chin CWL. P1419 Sex-related differences in cardiac remodeling in health and hypertension. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
National Medical Research Council
OnBehalf
National Heart Centre Singapore
BACKGROUND
Adverse cardiac remodelling is associated with worse cardiovascular outcomes. Development of left ventricular hypertrophy (defined as increased myocardial mass) is a complex process mediated by myocardial wall thickening and/or ventricular dilatation. Sex-related differences in the relationship between myocardial mass and wall thickening/ventricular dilatation have not been well-described.
PURPOSE
We examine differences in determinants and patterns of cardiac remodeling between males and females.
METHODS
Comprehensive cardiovascular magnetic resonance imaging was performed in 1006 participants: 316 healthy volunteers (50% males, 46 ± 14 years) and 690 asymptomatic hypertensive patients (60% males, 57 ± 11 years). Myocardial mass, ventricular volumes and maximal myocardial wall thickness (across 16 myocardial segments) were measured using standardized contouring techniques. Clinically relevant variables (age, weight, height, and adiposity) that demonstrated significant univariate association with myocardial mass (P < 0.05) were selected in the multivariable linear regression model using the forward approach.
RESULTS
Increased body weight, lower body fat composition and higher systolic blood pressures were independently associated with increased myocardial mass in healthy volunteers (males and females) and hypertensive females. In hypertensive males, only increased body weight and elevated systolic blood pressure were independently associated with increased myocardial mass.
The association between myocardial mass and ventricular volumes was almost identical between males and females (P = 0.65 for interaction; Figure). Conversely, there was a significant gender-related difference in the association between wall thickness and myocardial mass after adjusting for potential confounders (P < 0.001 for interaction). Concentric remodeling was initially more evident in males; but further with increase, myocardial mass was associated with greater concentric remodeling in females (Figure). Similar results were observed when analyses were performed separately in healthy volunteers and hypertensive patients.
CONCLUSION
There were sex-related differences in concentric remodeling at progressive stages of myocardial hypertrophy that may explain the higher prevalence of heart failure with preserved ejection fraction reported in females.
Abstract P1419 Figure
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Affiliation(s)
- A I H Phua
- Flinders University, Adelaide, Australia
| | - S W Tara
- Flinders University, Adelaide, Australia
| | - T T Le
- National Heart Centre Singapore, Singapore, Singapore
| | - J A Bryant
- National Heart Centre Singapore, Singapore, Singapore
| | - D F K Toh
- National Heart Centre Singapore, Singapore, Singapore
| | - B W Y Ang
- National Heart Centre Singapore, Singapore, Singapore
| | - B Su
- National Heart Centre Singapore, Singapore, Singapore
| | - S A Cook
- National Heart Centre Singapore, Singapore, Singapore
| | - C W L Chin
- National Heart Centre Singapore, Singapore, Singapore
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17
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Le TT, Bryant JA, Ang BWY, Pua CJ, Su BWY, Ho PY, Lim S, Huang W, Lee PT, Tang HC, Chin CT, Tan BY, Cook SA, Chin CW. 202Discriminating between exercise induced cardiac remodeling and dilated cardiomyopathy using exercise cardiac MRI. Eur Heart J Cardiovasc Imaging 2019. [DOI: 10.1093/ehjci/jez128.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T T Le
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - J A Bryant
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - B W Y Ang
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - C J Pua
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - B W Y Su
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - P Y Ho
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - S Lim
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - W Huang
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - P T Lee
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - H C Tang
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - C T Chin
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - B Y Tan
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - S A Cook
- National Heart Centre Singapore (NHCS), Singapore, Singapore
| | - C W Chin
- National Heart Centre Singapore (NHCS), Singapore, Singapore
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18
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Lee PT, Uy FMR, Le TT, Foo JS, Tan JL, Chin CWL. P367TGA with interarterial coronary artery course and Athlete"s heart. Eur Heart J Cardiovasc Imaging 2019. [DOI: 10.1093/ehjci/jez109.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- P T Lee
- National Heart Centre Singapore, Singapore, Singapore
| | - F M R Uy
- National Heart Centre Singapore, Singapore, Singapore
| | - T T Le
- National Heart Centre Singapore, Singapore, Singapore
| | - J S Foo
- National Heart Centre Singapore, Singapore, Singapore
| | - J L Tan
- National Heart Centre Singapore, Singapore, Singapore
| | - C W L Chin
- National Heart Centre Singapore, Singapore, Singapore
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19
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Iyer CC, Corlett KM, Massoni-Laporte A, Duque SI, Madabusi N, Tisdale S, McGovern VL, Le TT, Zaworski PG, Arnold WD, Pellizzoni L, Burghes AHM. Mild SMN missense alleles are only functional in the presence of SMN2 in mammals. Hum Mol Genet 2018; 27:3404-3416. [PMID: 29982416 PMCID: PMC6140769 DOI: 10.1093/hmg/ddy251] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 06/19/2018] [Accepted: 07/02/2018] [Indexed: 12/17/2022] Open
Abstract
Spinal muscular atrophy (SMA) is caused by reduced levels of full-length SMN (FL-SMN). In SMA patients with one or two copies of the Survival Motor Neuron 2 (SMN2) gene there are a number of SMN missense mutations that result in milder-than-predicted SMA phenotypes. These mild SMN missense mutation alleles are often assumed to have partial function. However, it is important to consider the contribution of FL-SMN as these missense alleles never occur in the absence of SMN2. We propose that these patients contain a partially functional oligomeric SMN complex consisting of FL-SMN from SMN2 and mutant SMN protein produced from the missense allele. Here we show that mild SMN missense mutations SMND44V, SMNT74I or SMNQ282A alone do not rescue mice lacking wild-type FL-SMN. Thus, missense mutations are not functional in the absence of FL-SMN. In contrast, when the same mild SMN missense mutations are expressed in a mouse containing two SMN2 copies, functional SMN complexes are formed with the small amount of wild-type FL-SMN produced by SMN2 and the SMA phenotype is completely rescued. This contrasts with SMN missense alleles when studied in C. elegans, Drosophila and zebrafish. Here we demonstrate that the heteromeric SMN complex formed with FL-SMN is functional and sufficient to rescue small nuclear ribonucleoprotein assembly, motor neuron function and rescue the SMA mice. We conclude that mild SMN missense alleles are not partially functional but rather they are completely non-functional in the absence of wild-type SMN in mammals.
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Affiliation(s)
- Chitra C Iyer
- Department of Biological Chemistry and Pharmacology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Kaitlyn M Corlett
- Department of Biological Chemistry and Pharmacology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Aurélie Massoni-Laporte
- Department of Biological Chemistry and Pharmacology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Sandra I Duque
- Department of Biological Chemistry and Pharmacology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Narasimhan Madabusi
- Department of Biological Chemistry and Pharmacology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Sarah Tisdale
- Center for Motor Neuron Biology and Disease, Columbia University, New York, NY, USA
- Department of Pathology and Cell Biology, Columbia University, New York, NY, USA
| | - Vicki L McGovern
- Department of Biological Chemistry and Pharmacology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Thanh T Le
- Department of Biological Chemistry and Pharmacology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | | | - W David Arnold
- Department of Neurology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Livio Pellizzoni
- Center for Motor Neuron Biology and Disease, Columbia University, New York, NY, USA
- Department of Pathology and Cell Biology, Columbia University, New York, NY, USA
| | - Arthur H M Burghes
- Department of Biological Chemistry and Pharmacology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Department of Neurology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
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20
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Yeow CES, Cai J, Le TT, Bryant JA, Su B, Chin CWL. P3696Determinants of left ventricular trabeculations in hypertensive patients. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- C E S Yeow
- Royal College of Surgeons in Ireland, Dublin, Ireland
| | - J Cai
- National Heart Centre Singapore, Singapore, Singapore
| | - T T Le
- National Heart Centre Singapore, Singapore, Singapore
| | - J A Bryant
- National Heart Centre Singapore, Singapore, Singapore
| | - B Su
- National Heart Centre Singapore, Singapore, Singapore
| | - C W L Chin
- National Heart Centre Singapore, Singapore, Singapore
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21
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Santoru A, Garroni S, Pistidda C, Milanese C, Girella A, Marini A, Masolo E, Valentoni A, Bergemann N, Le TT, Cao H, Haase D, Balmes O, Taube K, Mulas G, Enzo S, Klassen T, Dornheim M. A new potassium-based intermediate and its role in the desorption properties of the K-Mg-N-H system. Phys Chem Chem Phys 2016; 18:3910-20. [PMID: 26765796 DOI: 10.1039/c5cp06963g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New insights into the reaction pathways of different potassium/magnesium amide-hydride based systems are discussed. In situ SR-PXD experiments were for the first time performed in order to reveal the evolution of the phases connected with the hydrogen releasing processes. Evidence of a new K-N-H intermediate is shown and discussed with particular focus on structural modification. Based on these results, a new reaction mechanism of amide-hydride anionic exchange is proposed.
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Affiliation(s)
- A Santoru
- Institute of Materials Research, Materials Technology, Helmholtz-Zentrum Geesthacht GmbH, Max-Planck Strasse 1, D-21502 Geesthacht, Schleswig-Holstein, Germany.
| | - S Garroni
- Department of Chemistry and Pharmacy, INSTM, Via Vienna 2, I-07100 Sassari, Italy
| | - C Pistidda
- Institute of Materials Research, Materials Technology, Helmholtz-Zentrum Geesthacht GmbH, Max-Planck Strasse 1, D-21502 Geesthacht, Schleswig-Holstein, Germany.
| | - C Milanese
- Pavia H2 Lab, Department of Chemistry, Physical Chemistry Section, University of Pavia, VialeTaramelli 16, I-27100 Pavia, Italy
| | - A Girella
- Pavia H2 Lab, Department of Chemistry, Physical Chemistry Section, University of Pavia, VialeTaramelli 16, I-27100 Pavia, Italy
| | - A Marini
- Pavia H2 Lab, Department of Chemistry, Physical Chemistry Section, University of Pavia, VialeTaramelli 16, I-27100 Pavia, Italy
| | - E Masolo
- Department of Chemistry and Pharmacy, INSTM, Via Vienna 2, I-07100 Sassari, Italy
| | - A Valentoni
- Department of Chemistry and Pharmacy, INSTM, Via Vienna 2, I-07100 Sassari, Italy
| | - N Bergemann
- Institute of Materials Research, Materials Technology, Helmholtz-Zentrum Geesthacht GmbH, Max-Planck Strasse 1, D-21502 Geesthacht, Schleswig-Holstein, Germany.
| | - T T Le
- Institute of Materials Research, Materials Technology, Helmholtz-Zentrum Geesthacht GmbH, Max-Planck Strasse 1, D-21502 Geesthacht, Schleswig-Holstein, Germany.
| | - H Cao
- Institute of Materials Research, Materials Technology, Helmholtz-Zentrum Geesthacht GmbH, Max-Planck Strasse 1, D-21502 Geesthacht, Schleswig-Holstein, Germany.
| | - D Haase
- MAX IV Laboratory, Lund University, Römers väg 1, 22363 Lund, Sweden
| | - O Balmes
- MAX IV Laboratory, Lund University, Römers väg 1, 22363 Lund, Sweden
| | - K Taube
- Institute of Materials Research, Materials Technology, Helmholtz-Zentrum Geesthacht GmbH, Max-Planck Strasse 1, D-21502 Geesthacht, Schleswig-Holstein, Germany.
| | - G Mulas
- Department of Chemistry and Pharmacy, INSTM, Via Vienna 2, I-07100 Sassari, Italy
| | - S Enzo
- Department of Chemistry and Pharmacy, INSTM, Via Vienna 2, I-07100 Sassari, Italy
| | - T Klassen
- Institute of Materials Research, Materials Technology, Helmholtz-Zentrum Geesthacht GmbH, Max-Planck Strasse 1, D-21502 Geesthacht, Schleswig-Holstein, Germany.
| | - M Dornheim
- Institute of Materials Research, Materials Technology, Helmholtz-Zentrum Geesthacht GmbH, Max-Planck Strasse 1, D-21502 Geesthacht, Schleswig-Holstein, Germany.
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22
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Chumphukam O, Le TT, Piletsky S, Cass AEG. Generation of a pair of independently binding DNA aptamers in a single round of selection using proximity ligation. Chem Commun (Camb) 2016; 51:9050-3. [PMID: 25941004 DOI: 10.1039/c5cc02314a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ability to rapidly generate a pair of aptamers that bind independently to a protein target would greatly extend their use as reagents for two site ('sandwich') assays. We describe here a method to achieve this through proximity ligation. Using lysozyme as a target we demonstrate that under optimal conditions such a pair of aptamers, with nanomolar affinities, can be generated in a single round.
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Affiliation(s)
- O Chumphukam
- Department of Chemistry, Imperial College London, UK.
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23
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Martins Fernandes S, Badano L, Garcia Campos A, Erdei T, Mehdipoor G, Hanboly N, Michalski BW, Vriz O, Mo VY, Le TT, Ribeiro JM, Ternacle J, Yurdakul SELEN, Shetye A, Stoebe S, Lisowska A, Chinali M, Orabona M, Contaldi C, De La Chica JA, Codolosa JN, Trzcinski P, Prado Diaz S, Morales Portano JD, Ha SJ, Valente F, Joseph G, Valente F, Scali MC, Cordeiro F, Duchateau N, Fabris E, Costantino MF, Cho IJ, Goublaire C, Lam W, Galli E, Kim KH, Mariani M, Malev E, Zuercher F, Tang Z, Cimino S, Mahia P, De La Chica JA, Petrovic J, Ciobotaru V, Remsey- Semmelweiss E, Kogoj P, Guerreiro S, Saxena A, Mozenska O, Pontone G, Macaya Ten F, Caballero L, Avegliano G, Halmai L, Reis L, Trifunovic D, Gospodinova M, Makavos G, D'ascenzi F, Dantas Tavares De Melo M, Bonapace S, Kulkarni A, Cameli M, Ingvarsson A, Driessen MMP, Tufekcioglu O, Radulescu D, Barac A, Cioffi G, Almeida Morais L, Ledakowicz-Polak A, Portugal G, Naksuk N, Parato VM, Kovalova S, Cherubini A, Corrado G, Malev E, Wierzbowska-Drabik K, Lesevic H, Laredj N, Pieles GE, Generati G, Van Zalen JJ, Aquila I, Cheng HL, Lanzoni L, Asmarats Serra L, Kadrabulatova S, Ranjbar S, Szczesniak-Stanczyk D, Sharka I, Di Salvo G, Ben Kahla S, Li L, Hadeed HA, Habeeb HA, Toscano A, Granata F, Djikic D, Wdowiak-Okrojek K, Girgis HYA, Sharma A, Soro C, Gallego Page JC, Corneli M, Teixeira R, Roussin I, Lynch M, Muraru D, Romeo G, Ermacora D, Marotta C, Aruta P, Cucchini U, Iliceto S, Martin-Fernandez M, De La Hera Galarza JM, Corros-Vicente C, Colunga Blanco S, Velasco-Alonso E, Leon-Aguero V, Rodriguez-Suarez ML, Moris De La Tassa C, Edwards J, Braim D, Price C, Fraser AG, Salmani F, Arjmand Shabestari A, Szymczyk E, Kupczynska K, Peczek L, Nawrot B, Lipiec P, Kasprzak JD, Driussi C, Ferrara F, Brosolo G, Antonini-Canterin F, Magne J, Aboyans V, Bossone E, Bellucci BM, Fisher JM, Balekian AA, Idapalapati S, Huang F, Wong JI, Tan RS, Teixeira R, Madeira M, Almeida I, Reis L, Siserman A, Dinis P, Dias L, Ramos AP, Goncalves L, Wan FW, Sawaki DS, Dubois-Rande JLDR, Adnot SA, Czibik GC, Derumeaux GD, Ercan G, Tekkesin ILKER, Sahin ST, Cengiz B, Celik G, Demircan S, Aytekin SAIDE, Razvi NA, Nazir SA, Price N, Khan JN, Kanagala P, Singh A, Squire I, Mccann GP, Langel M, Pfeiffer D, Hagendorff A, Ptaszynska-Kopczynska K, Marcinkiewicz-Siemion M, Knapp M, Witkowski M, Musial WJ, Kaminski K, Natali B, D' Anna C, Leonardi B, Secinaro A, Pongiglione G, Rinelli G, Renard S, Michel N, Mancini J, Haentjens J, Sitbon O, Habib G, Imbriaco M, Alcidi G, Santoro C, Buonauro A, Lo Iudice F, Lembo M, Cuocolo A, Trimarco B, Galderisi M, Mora Robles J, Roldan Jimenez MA, Mancisidor MA, De Mora MA, Alnabelsi T, Goykhman I, Koshkelashvili N, Romero-Corral A, Pressman GS, Michalski BW, Kupczynska K, Miskowiec D, Lipiec P, Kasprzak JD, Montoro Lopez N, Refoyo Salicio E, Valbuena Lopez SC, Gonzalez O, Alvarez C, Moreno Yanguela M, Bartha Rasero JL, De La Calle M, Guzman Martinez G, Suarez-Cuenca JA, Merino JA, Gomez Alvarez EB, Delgado LG, Woo YM, Bang WD, Sohn GH, Cheong SS, Yoo SY, Rodriguez Palomares JF, Gutierrez L, Maldonado G, Pineda V, Galian L, Teixido G, Gonzalez Allujas MT, Evangelista A, Garcia Dorado D, Zaremba T, Ekeloef S, Heiberg E, Engblom H, Jensen SE, Sogaard P, Rodriguez Palomares JF, Gutierrez L, Garcia G, Pineda V, Galian L, Teixido G, Gonzalez Allujas MT, Evangelista A, Garcia Dorado D, Dini FL, Galli F, Lattanzi F, Picano E, Marzilli M, Leao S, Moz M, Magalhaes P, Trigo J, Mateus PS, Ferreira A, Moreira JI, De Craene M, Legallois D, Labombarda F, Pellissier A, Sermesant M, Saloux E, Merlo M, Moretti M, Barbati G, Stolfo D, Gigli M, Pinamonti B, Sinagra G, Dores E, Matera A, Innelli P, Innelli P, Lopizzo A, Violini R, Fiorilli R, Cappabianca G, Picano E, Tarsia G, Seo J, Chang HJ, Heo R, Kim IC, Shim CY, Hong GR, Chung N, Melissopoulou MM, Nguyen V, Brochet E, Cimadevilla C, Codogno I, Vahanian A, Messika-Zeitoun D, Pontana F, Vassiliou V, Prasad S, Leclercq C, Samset E, Donal E, Lim DS, Bianchi G, Rossi F, Gianetti J, Marchi F, Cerone E, Nardelli A, Terrazzi M, Solinas M, Maffei S, Pshepiy A, Vasina L, Timofeev E, Reeva S, Zemtsovsky E, Brugger N, Jahren S, De Marchi SF, Seiler C, Jin CN, Tang H, Fan K, Kam K, Yan BP, Yu CM, Lee PW, Reali M, Silvetti E, Salatino T, Mancone M, Pennacchi M, Giordano A, Sardella G, Agati L, Tirado G, Nogales-Romo MT, Marcos-Alberca P, De Agustin A, Almeria C, Rodrigo JL, Garcia Fernandez MA, Macaya C, Perez De Isla L, Mancisidor M, Lara Garcia C, Vivancos R, De Mora M, Petrovic M, Vujisic-Tesic B, Trifunovic D, Boricic-Kostic M, Petrovic I, Draganic G, Petrovic O, Tomic-Dragovic M, Furlan T, Ambrozic J, Mohorko Pleskovic PN, Bunc M, Ribeiras R, Abecasis J, Andrade MJ, Mendes M, Ramakrishnan S, Gupta SK, Juneja R, Kothari SS, Zaleska M, Segiet A, Chwesiuk S, Kroc A, Kosior DA, Andreini D, Solbiati A, Guglielmo M, Mushtaq S, Baggiano A, Beltrama V, Rota C, Guaricci AI, Pepi M, Pons Llinares J, Asmarats Serra L, Pericas Ramis P, Caldes Llull O, Grau Sepulveda A, Frontera G, Vaquer Segui A, Noris M, Bethencourt Gonzalez A, Climent Paya V, Martinez Moreno M, Saura D, Oliva MJ, Sanchez Quinones J, Garcia Honrubia A, Valdes M, De La Morena G, Terricabras M, Costabel JP, Ronderos R, Evangelista A, Venturini C, Galve E, Nemes A, Neubauer S, Rahman Haley S, Banner N, Teixeira R, Caetano F, Almeida I, Trigo J, Botelho A, Silva J, Nascimento J, Goncalves L, Tesic M, Jovanovic I, Petrovic O, Boricic-Kostic M, Dragovic M, Petrovic M, Stepanovic J, Banovic M, Vujisic-Tesic B, Guergelcheva V, Chamova T, Sarafov S, Tournev I, Denchev S, Ikonomidis I, Psarogiannakopoulos P, Tsirigotis P, Paraskevaidis I, Lekakis J, Pelliccia A, Natali BM, Cameli M, Focardi M, Bonifazi M, Mondillo S, Lima C, Assed L, Kalil Filho R, Mady C, Bochi EA, Salemi VMC, Targher G, Valbusa F, Rossi A, Lanzoni L, Lipari P, Zenari L, Molon G, Canali G, Barbieri E, Li L, Craft M, Nanda M, Lorenzo JM, Kutty S, Bombardini T, Sparla S, Di Tommaso C, Losito M, Incampo E, Maccherini M, Mondillo S, Werther Evaldsson A, Radegran G, Stagmo M, Waktare J, Roijer A, Meurling CJ, Hui W, Meijboom FJ, Bijnens B, Dragulescu A, Mertens L, Friedberg MK, Sensoy B, Suleymanoglu M, Akin Y, Sahan E, Sasmaz H, Pasca L, Buzdugan E, Chis B, Stoicescu L, Lynce FC, Smith KL, Mete M, Isaacs C, Viapiana O, Di Nora C, Ognibeni F, Fracassi E, Giollo A, Mazzone C, Faganello G, Di Lenarda A, Rossini M, Galrinho A, Branco L, Timoteo AT, Rodrigues I, Daniel P, Rosa S, Ferreira L, Ferreira R, Polak L, Krauza G, Stokfisz K, Zielinska M, Branco LM, Galrinho A, Mota Carmo M, Teresa Timoteo A, Aguiar Rosa S, Abreu J, Pinto Teixeira P, Viveiros Monteiro A, Cruz Ferreira R, Peeraphatdit T, Chaiteerakij R, Klarich KW, Masia S, Necas J, Nistri S, Negri F, Barbati G, Cioffi G, Russo G, Mazzone C, Faganello G, Pandullo C, Di Lenarda A, Durante A, Rovelli E, Genchi V, Trabattoni L, Zerboni SC, Cattaneo L, Butti E, Ferrari G, Luneva E, Mitrofanova L, Uspensky V, Zemtsovsky E, Kasprzak JD, Rosner S, Karl M, Ott I, Sonne C, Ali Lahmar HM, Hammou L, Forsey J, Gowing L, Miller F, Ramanujam P, Stuart AG, Williams CA, Bandera F, Pellegrino M, Carbone F, Labate V, Alfonzetti E, Guazzi M, Patel NR, Raju P, Beale L, Brickley G, Lloyd GW, Fernandez-Golfin C, Gonzalez A, Rincon LM, Hinojar R, Garcia A, Megias A, Jimenez-Nacher JJ, Moya JL, Zamorano JL, Molon G, Canali G, Bonapace S, Chiampan A, Albrigi L, Barbieri E, Noris Mora M, Rodriguez Fernandez A, Exposito Pineda C, Grande C, Gonzalez Colino R, Macaya Ten F, Fernandez Vazquez X, Fortuny Frau E, Bethencourt Gonzalez A, Karvandi M, Blaszczyk R, Zarczuk R, Brzozowski W, Janowski M, Wysokinski A, Stanczyk B, Myftiu S, Teferici D, Quka A, Dado E, Djamandi J, Kresto L, Duka A, Kristo A, Balla I, Issa Z, Moiduddin N, Siblini G, Bulbul Z, Abid L, Abid D, Kammoun S, Rush E, Craft M, Goodwin J, Kreikemeier R, Cantinotti M, Kutty S, Zolaly MA, Khoshhal SQ, El-Harbi K, Tarawah A, Al-Hawsawi Z, Al-Mozainy I, Bakhoum SWG, Nabil MN, Elebrashy IN, Chinali M, Albanese S, Carotti A, Iacobelli R, Esposito C, Secinaro A, Moscogiuri G, Pasquini L, Malvezzi Caracciolo M, Bianchi RM, Caso P, Arenga F, Riegler L, Scarafile R, D'andrea A, Russo MG, Calabro' P, Simic DS, Peric VP, Mujovic NM, Marinkovic MM, Jankovic NJ, Shim A, Wejner-Mik P, Kasprzak JD, Lipiec P, Jain N, Kharwar R, Saran RK, Narain VS, Dwivedi SK, Sethi R, Chandra S, Pradhan A, Safal S, Marchetti MF, Cacace C, Congia M, Nissardi V, Ruscazio M, Meloni L, Montisci R, Gallego Sanchez G, Calero S, Portero JJ, Tercero A, Garcia JC, Barambio M, Martinez Lazaro R, Meretta AH, Perea GO, Belcastro F, Aguirre E, De Luca I, Henquin R, Masoli O. Poster session 2THE IMAGING EXAMINATIONP536Appropriate use criteria of transthoracic echocardiography and its clinical impact: a continuous challengeP537Implementation of proprietary plug-ins in the DICOM-based computerized echo reporting system fuels the use of 3D echo and deformation imaging in the clinical routine of a multivendor laboratoryP538Exercise stress echocardiography appropriate use criteria: real-life cases classification ease and agreement among cardiologistsANATOMY AND PHYSIOLOGY OF THE HEART AND GREAT VESSELSP539Functional capacity in older people with normal ejection fraction correlates with left ventricular functional reserve and carotid-femoral pulse wave velocity but not with E/e and augmentation indexP540Survey of competency of practitioners for diagnosis of acute cardiopulmonary diseases manifest on chest x-rayASSESSMENT OF DIAMETERS, VOLUMES AND MASSP541Left atrium remodeling in dialysis patients with normal ejection fractionP542The prediction of postinfarction left ventricular remodeling and the role of of leptin and MCP-1 in regard to the presence of metabolic syndromeP543Ascending aorta and common carotid artery: diameters and stiffness in a group of 584 healthy subjectsAssessments of haemodynamicsP544Alternate echo parameters in patients without estimable RVSPAssessment of systolic functionP545Reduced contractile performance in heart failure with preserved ejection fraction: determination using novel preload-adjusted maximal left ventricular ejection forceP546Left ventricular dimensions and prognosis in acute coronary syndromesP547Time course of myocardial alterations in a murine model of high fat diet: A strain rate imaging studyP548Subclinical left ventricular systolic dysfunction in patients with premature ventricular contractionsP549Global myocardial strain by CMR-based feature tracking (FT) and tagging to predict development of severe left ventricular systolic dysfunction after acute st-elevation myocardial infarctionP550Echocardiographic analysis of left and right ventricular function in patients after mitral valve reconstructionP551The role of regional longitudinal strain assessment in predicting response to cardiac resynchronization therapy in patients with left ventricular systolic dysfunction and left bundle branch blockP552Speckle tracking automatic border detection improves echocardiographic evaluation of right ventricular systolic function in repaired tetralogy of fallot patients: comparison with MRI findingsP553Echocardiography: a reproducible and relevant tool in pah? intermediate results of the multicentric efort echogardiographic substudy (evaluation of prognostic factors and therapeutic targets in pah)Assessment of diastolic functionP554Relationship between left ventricular filling pressures and myocardial fibrosis in patients with uncomplicated arterial hypertensionP555Cardiac rehabilitation improves echocardiographic parameters of diastolic function in patients with ischemic heart diseaseP556Diastolic parameters in the calcified mitral annulusP557Biomarkers and echocardiography - combined weapon to diagnose and prognose heart failure with and without preserved ejection fractionP558Diastolic function changes of the maternal heart in twin and singleton pregnancyIschemic heart diseaseP559Syntax score as predictor for the correlation between epicardial adipose tissue and the severity of coronary lesions in patients with significant coronary diseaseP560Impact of strain analysis in ergonovine stress echocardiography for diagnosis vasospastic anginaP561Cardiac magnetic resonance tissue tracking: a novel method to predict infarct transmurality in acute myocardial infarctionP562Infarct size is correlated to global longitudinal strain but not left ventricular ejection fraction in the early stage of acute myocardial infarctionP563Magnetic resonance myocardial deformation assessment with tissue tracking and risk stratification in acute myocardial infarction patientsP564Increase in regional end-diastolic wall thickness by transthoracic echocardiography as a biomarker of successful reperfusion in anterior ST elevation acute myocardial infarctionP565Mitral regurgitation is associated with worse long-term prognosis in ST-segment elevation myocardial infarction treated with primary percutaneous coronary interventionP566Statistical significance of 3D motion and deformation indexes for the analysis of LAD infarctionHeart valve DiseasesP567Paradoxical low gradient aortic stenosis: echocardiographic progression from moderate to severe diseaseP568The beneficial effects of TAVI in mitral insufficiencyP569Impact of thoracic aortic calcification on the left ventricular hypertrophy and its regression after aortic valve replacement in patients with severe aortic stenosisP570Additional value of exercise-stress echocardiography in asymptomatic patients with aortic valve stenosisP571Valvulo-arterial impedance in severe aortic stenosis: a dual imaging modalities studyP572Left ventricular mechanics: novel tools to evaluate left ventricular performance in patients with aortic stenosisP573Comparison of long-term outcome after percutaneous mitral valvuloplasty versus mitral valve replacement in moderate to severe mitral stenosis with left ventricular dysfunctionP574Incidence of de novo left ventricular dysfunction in patient treated with aortic valve replacement for severe aortic regurgitationP575Transforming growth factor-beta dependant progression of the mitral valve prolapseP576Quantification of mitral regurgitation with multiple jets: in vitro validation of three-dimensional PISA techniqueP577Impaired pre-systolic contraction and saddle-shape deepening of mitral annulus contributes to atrial functional regurgitation: a three-dimensional echocardiographic studyP578Incidence and determinants of left ventricular (lv) reverse remodeling after MitraClip implantation in patients with moderate-to severe or severe mitral regurgitation and reduced lv ejection fractionP579Severe functional tricuspid regurgitation in rheumatic heart valve disease. New insights from 3D transthoracic echocardiographyP58015 years of evolution of the etiologic profile for prosthetic heart valve replacement through an echocardiography laboratoryP581The role of echocardiography in the differential diagnosis of prolonged fever of unknown originP582Predictive value for paravalvular regurgitation of 3-dimensional anatomic aortic annulus shape assessed by multidetector computed tomography post-transcatheter aortic valve replacementP583The significance and advantages of echo and CT imaging & measurement at transcatherter aortic valve implantation through the left common carotid accessP584Comparison of the self-expandable Medtronic CoreValve versus the balloon-expandable Edwards SAPIEN bioprostheses in high-risk patients undergoing transfemoral aortic valve implantationP585The impact of transcatheter aortic valve implantation on mitral regurgitation severityP586Echocardiographic follow up of children with valvular lesions secondary to rheumatic heart disease: Data from a prospective registryP587Valvular heart disease and different circadian blood pressure profilesCardiomyopathiesP588Comparison of transthoracic echocardiography versus cardiac magnetic for implantable cardioverter defibrillator therapy in primary prevention strategy dilated cardiomyopathy patientsP589Incidence and prognostic significance of left ventricle reverse remodeling in a cohort of patients with idiopathic dilated cardiomyopathyP590Early evaluation of diastolic function in fabry diseaseP591Echocardiographic predictors of atrial fibrillation development in hypertrophic cardiomyopathyP592Altered Torsion mechanics in patients with hypertrophic cardiomyopathy: LVOT-obstruction is the topdog?P593Prevention of sudden cardiac death in hypertrophic cardiomyopathy: what has changed in the guidelines?P594Coronary microcirculatory function as determinator of longitudinal systolic left ventricular function in hypertrophic cardiomyopathyP595Detection of subclinical myocardial dysfunction by tissue Doppler ehocardiography in patients with muscular dystrophiesP596Speckle tracking myocardial deformation analysis and three dimensional echocardiography for early detection of chemotherapy induced cardiac dysfunction in bone marrow transplantation patientsP597Left ventricular non compaction or hypertrabeculation: distinguishing between physiology and pathology in top-level athletesP598Role of multi modality imaging in familiar screening of Danon diseaseP599Early impairment of global longitudinal left ventricular systolic function independently predicts incident atrial fibrillation in type 2 diabetes mellitusP600Fetal cardiovascular programming in maternal diabetes mellitus and obesity: insights from deformation imagingP601Longitudinal strain stress echo evaluation of aged marginal donor hearts: feasibility in the Adonhers project.P602Echocardiographic evaluation of left ventricular size and function following heart transplantation - Gender mattersSystemic diseases and other conditionsP603The impact of septal kinetics on adverse ventricular-ventricular interactions in pulmonary stenosis and pulmonary arterial hypertensionP604Improvement in right ventricular mechanics after inhalation of iloprost in pulmonary hypertensionP605Does the treatment of patients with metabolic syndrome correct the right ventricular diastolic dysfunction?P606Predictors of altered cardiac function in breast cancer survivors who were treated with anthracycline-based therapyP607Prevalence and factors related to left ventricular systolic dysfunction in asymptomatic patients with rheumatoid arthritis: a prospective tissue-doppler echocardiography studyP608Diastolic and systolic left ventricle dysfunction presenting different prognostic implications in cardiac amyloidosisP609Diagnostic accuracy of Bedside Lung Ultrasonography in Emergency (BLUE) protocol for the diagnosis of pulmonary embolismP610Right ventricular systolic dysfunction and its incidence in breast cancer patients submitted to anthracycline therapyP611Right ventricular dysfunction is an independent predictor of survival among cirrhotic patients undergoing liver transplantCongenital heart diseaseP612Hypoplasia or absence of posterior leaflet: a rare congenital anomaly of the mitral valveP613ECHO screening for Barlow disease in proband's relativesDiseases of the aortaP614Aortic size distribution and prognosis in an unselected population of patients referred for standard transthoracic echocardiographyP615Abdominal aorta aneurysm ultrasonographic screening in a large cohort of asympromatic volounteers in an Italian urban settingP616Thoracic aortic aneurysm and left ventricular systolic functionStress echocardiographyP617Wall motion score index, systolic mitral annulus velocity and left ventricular mass predicted global longitudinal systolic strain in 238 patients examined by stress echocardiographyP618Prognostic parameters of exercise-induced severe mitral valve regurgitation and exercise-induced systolic pulmonary hypertensionP619Risk stratification after myocardial infarction: prognostic value of dobutamine stress echocardiographyP620relationship between LV and RV myocardial contractile reserve and metabolic parameters during incremental exercise and recovery in healthy children using 2-D strain analysisP621Increased peripheral extraction as a mechanism compensatory to reduced cardiac output in high risk heart failure patients with group 2 pulmonary hypertension and exercise oscillatory ventilationP622Can exercise induced changes in cardiac synchrony predict response to CRT?Transesophageal echocardiographyP623Fully-automated software for mitral valve assessment in chronic mitral regurgitation by three-dimensional transesophageal echocardiographyP624Real-time 3D transesophageal echocardiography provides more accurate orifice measurement in percutaneous transcatheter left atrial appendage closureP625Percutaneous closure of left atrial appendage: experience of 36 casesReal-time three-dimensional TEEP626Real-time three-dimensional transesophageal echocardiography during pulmonary vein cryoballoon ablation for atrial fibrilationP627Three dimensional ultrasound anatomy of intact mitral valve and in the case of type 2 disfunctionTissue Doppler and speckle trackingP629Left ventricle wall motion tracking from echocardiographic images by a non-rigid image registrationP630The first experience with the new prototype of a robotic system for remote echocardiographyP631Non-invasive PCWP influence on a loop diuretics regimen monitoring model in ADHF patients.P632Normal range of left ventricular strain, dimensions and ejection fraction using three-dimensional speckle-tracking echocardiography in neonatesP633Circumferential ascending aortic strain: new parameter in the assessment of arterial stiffness in systemic hypertensionP634Aortic vascular properties in pediatric osteogenesis imperfecta: a two-dimensional echocardiography derived aortic strain studyP635Assessment of cardiac functions in children with sickle cell anemia: doppler tissue imaging studyP636Assessment of left ventricular function in type 1 diabetes mellitus patients by two-dimensional speckle tracking echocardiography: relation to duration and control of diabetesP637A study of left ventricular torsion in l-loop ventricles using speckle-tracking echocardiographyP638Despite No-Reflow, global and regional longitudinal strains assessed by two-dimensional speckle tracking echocardiography are predictive indexes of left ventricular remodeling in patients with STEMIP639The function of reservoir of the left atrium in patients with medicaly treated arterial hypertensionP640The usefulness of speckle tracking analysis for predicting the recovery of regional systolic function after myocardial infarctionP641Two dimensional speckle tracking echocardiography in assessment of left ventricular systolic function in patients with rheumatic severe mitral regurgitation and normal ejection fractionP642The prediction of left-main and tripple vessel coronary artery disease by tissue doppler based longitudinal strain and strain rate imagingP643Role of speckle tracking in predicting arrhythmic risk and occurrence of appropriate implantable defibrillator Intervention in patients with ischemic and non-ischemic cardiomyopathyComputed Tomography & Nuclear CardiologyP644Cardiac adrenergic activity in patients with nonischemic dilated cardiomyopathy. Correlation with echocardiographyP645Different vascular territories and myocardial ischemia, there is a gradient of association? Eur Heart J Cardiovasc Imaging 2015. [DOI: 10.1093/ehjci/jev278] [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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Nguyen HKL, Nguyen PTK, Nguyen TC, Hoang PVM, Le TT, Vuong CD, Nguyen AP, Tran LTT, Nguyen BG, Lê MQ. Virological characterization of influenza H1N1pdm09 in Vietnam, 2010-2013. Influenza Other Respir Viruses 2015; 9:216-24. [PMID: 25966032 PMCID: PMC4474498 DOI: 10.1111/irv.12323] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/30/2015] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVES Influenza A/H1N1pdm09 virus was first detected in Vietnam on May 31, 2009, and continues to circulate in Vietnam as a seasonal influenza virus. This study has monitored genotypic and phenotypic changes in this group of viruses during 2010-2013 period. DESIGN AND SETTING We sequenced hemagglutinin (HA) and neuraminidase (NA) genes from representative influenza A/H1N1pdm09 and compared with vaccine strain A/California/07/09 and other contemporary isolates from neighboring countries. Hemagglutination inhibition (HI) and neuraminidase inhibition (NAI) assays also were performed on these isolates. SAMPLE Representative influenza A/H1N1pdm09 isolates (n = 61) from ILI and SARI surveillances in northern Vietnam between 2010 and 2013. MAIN OUTCOME MEASURES AND RESULTS The HA and NA phylogenies revealed six and seven groups, respectively. Five isolates (8·2%) had substitutions G155E and N156K in the HA, which were associated with reduced HI titers by antiserum raised against the vaccine virus A/California/07/2009. One isolate from 2011 and one isolate from 2013 had a predicted H275Y substitution in the neuraminidase molecule, which was associated with reduced susceptibility to oseltamivir in a NAI assay. We also identified a D222N change in the HA of a virus isolated from a fatal case in 2013. CONCLUSIONS Significant genotypic and phenotypic changes in A/ H1N1pdm09 influenza viruses were detected by the National Influenza Surveillance System (NISS) in Vietnam between 2010 and 2013 highlighting the value of this system to Vietnam and to the region. Sustained NISS and continued virological monitoring of seasonal influenza viruses are required for vaccine policy development in Vietnam. 3.
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Affiliation(s)
- Hang K L Nguyen
- National Institute of Hygiene and EpidemiologyHanoi, Vietnam
| | | | - Thach C Nguyen
- National Institute of Hygiene and EpidemiologyHanoi, Vietnam
| | | | - Thanh T Le
- National Institute of Hygiene and EpidemiologyHanoi, Vietnam
| | - Cuong D Vuong
- National Institute of Hygiene and EpidemiologyHanoi, Vietnam
| | - Anh P Nguyen
- National Institute of Hygiene and EpidemiologyHanoi, Vietnam
| | - Loan T T Tran
- National Hospital of Traditional MedicineHanoi, Vietnam
| | | | - Mai Q Lê
- National Institute of Hygiene and EpidemiologyHanoi, Vietnam
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Fonville JM, Wilks SH, James SL, Fox A, Ventresca M, Aban M, Xue L, Jones TC, Le NMH, Pham QT, Tran ND, Wong Y, Mosterin A, Katzelnick LC, Labonte D, Le TT, van der Net G, Skepner E, Russell CA, Kaplan TD, Rimmelzwaan GF, Masurel N, de Jong JC, Palache A, Beyer WEP, Le QM, Nguyen TH, Wertheim HFL, Hurt AC, Osterhaus ADME, Barr IG, Fouchier RAM, Horby PW, Smith DJ. Antibody landscapes after influenza virus infection or vaccination. Science 2014; 346:996-1000. [PMID: 25414313 DOI: 10.1126/science.1256427] [Citation(s) in RCA: 313] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We introduce the antibody landscape, a method for the quantitative analysis of antibody-mediated immunity to antigenically variable pathogens, achieved by accounting for antigenic variation among pathogen strains. We generated antibody landscapes to study immune profiles covering 43 years of influenza A/H3N2 virus evolution for 69 individuals monitored for infection over 6 years and for 225 individuals pre- and postvaccination. Upon infection and vaccination, titers increased broadly, including previously encountered viruses far beyond the extent of cross-reactivity observed after a primary infection. We explored implications for vaccination and found that the use of an antigenically advanced virus had the dual benefit of inducing antibodies against both advanced and previous antigenic clusters. These results indicate that preemptive vaccine updates may improve influenza vaccine efficacy in previously exposed individuals.
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Affiliation(s)
- J M Fonville
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK.,WHO Collaborating Center for Modeling, Evolution, and Control of Emerging Infectious Diseases, Cambridge CB2 3EJ, UK.,Department of Viroscience, Erasmus Medical Center, Rotterdam 3015 CE, the Netherlands
| | - S H Wilks
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK.,WHO Collaborating Center for Modeling, Evolution, and Control of Emerging Infectious Diseases, Cambridge CB2 3EJ, UK
| | - S L James
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK.,WHO Collaborating Center for Modeling, Evolution, and Control of Emerging Infectious Diseases, Cambridge CB2 3EJ, UK
| | - A Fox
- Oxford University Clinical Research Unit and Wellcome Trust Major Overseas Programme, Hanoi, Vietnam
| | - M Ventresca
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK
| | - M Aban
- WHO Collaborating Centre for Reference and Research on Influenza, VIDRL at the Peter Doherty Institute for Infection and Immunity, Melbourne VIC 3000, Australia
| | - L Xue
- WHO Collaborating Centre for Reference and Research on Influenza, VIDRL at the Peter Doherty Institute for Infection and Immunity, Melbourne VIC 3000, Australia
| | - T C Jones
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK.,WHO Collaborating Center for Modeling, Evolution, and Control of Emerging Infectious Diseases, Cambridge CB2 3EJ, UK
| | - N M H Le
- Oxford University Clinical Research Unit and Wellcome Trust Major Overseas Programme, Hanoi, Vietnam
| | - Q T Pham
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - N D Tran
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Y Wong
- Oxford University Museum of Natural History, Oxford OX1 3PW, UK
| | - A Mosterin
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK.,WHO Collaborating Center for Modeling, Evolution, and Control of Emerging Infectious Diseases, Cambridge CB2 3EJ, UK
| | - L C Katzelnick
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK.,WHO Collaborating Center for Modeling, Evolution, and Control of Emerging Infectious Diseases, Cambridge CB2 3EJ, UK
| | - D Labonte
- Insect Biomechanics Group, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK
| | - T T Le
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - G van der Net
- Department of Viroscience, Erasmus Medical Center, Rotterdam 3015 CE, the Netherlands
| | - E Skepner
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK.,WHO Collaborating Center for Modeling, Evolution, and Control of Emerging Infectious Diseases, Cambridge CB2 3EJ, UK
| | - C A Russell
- WHO Collaborating Center for Modeling, Evolution, and Control of Emerging Infectious Diseases, Cambridge CB2 3EJ, UK.,Department of Veterinary Medicine, University of Cambridge, Cambridge CB3 0ES, UK
| | - T D Kaplan
- bobblewire.com, Saint Louis, MO 63112, US
| | - G F Rimmelzwaan
- Department of Viroscience, Erasmus Medical Center, Rotterdam 3015 CE, the Netherlands
| | - N Masurel
- Department of Viroscience, Erasmus Medical Center, Rotterdam 3015 CE, the Netherlands
| | - J C de Jong
- Department of Viroscience, Erasmus Medical Center, Rotterdam 3015 CE, the Netherlands
| | - A Palache
- Abbott Laboratories, Weesp 1380 DA, the Netherlands
| | - W E P Beyer
- Department of Viroscience, Erasmus Medical Center, Rotterdam 3015 CE, the Netherlands
| | - Q M Le
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - T H Nguyen
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - H F L Wertheim
- Oxford University Clinical Research Unit and Wellcome Trust Major Overseas Programme, Hanoi, Vietnam.,Nuffield Department of Clinical Medicine, Centre for Tropical Medicine, University of Oxford, Oxford OX3 7BN, UK
| | - A C Hurt
- WHO Collaborating Centre for Reference and Research on Influenza, VIDRL at the Peter Doherty Institute for Infection and Immunity, Melbourne VIC 3000, Australia.,Melbourne School of Population and Global Health, University of Melbourne, Parkville VIC 3010, Australia
| | - A D M E Osterhaus
- Department of Viroscience, Erasmus Medical Center, Rotterdam 3015 CE, the Netherlands
| | - I G Barr
- WHO Collaborating Centre for Reference and Research on Influenza, VIDRL at the Peter Doherty Institute for Infection and Immunity, Melbourne VIC 3000, Australia
| | - R A M Fouchier
- Department of Viroscience, Erasmus Medical Center, Rotterdam 3015 CE, the Netherlands
| | - P W Horby
- Oxford University Clinical Research Unit and Wellcome Trust Major Overseas Programme, Hanoi, Vietnam.,Nuffield Department of Clinical Medicine, Centre for Tropical Medicine, University of Oxford, Oxford OX3 7BN, UK
| | - D J Smith
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK.,WHO Collaborating Center for Modeling, Evolution, and Control of Emerging Infectious Diseases, Cambridge CB2 3EJ, UK.,Department of Viroscience, Erasmus Medical Center, Rotterdam 3015 CE, the Netherlands
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Le TT, Adamiak B, Benton DJ, Johnson CJ, Sharma S, Fenton R, McCauley JW, Iqbal M, Cass AEG. Aptamer-based biosensors for the rapid visual detection of flu viruses. Chem Commun (Camb) 2014; 50:15533-6. [PMID: 25354585 DOI: 10.1039/c4cc07888h] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
RNA aptamers showing affinity and specificity for different strains of human influenza virus were assembled onto gold nanoparticles that subsequently formed a gold nanoshell (AuNS) around the viral envelope. These shells could be visualised by transmission electron microscopy (TEM). Changes in size and structure of the AuNS coated virus can be used to detect the viruses. We show that sedimentation with a low cost centrifuge and visual determination can detect 3 × 10(8) viral particles.
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Affiliation(s)
- T T Le
- Department of Chemistry, Imperial College London, UK.
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Vuong CD, Hoang PMV, Nguyen HLK, Nguyen HT, Nguyen TC, Le TT, Dennis DT, Kapella BK, Kile JC, Le MQ. The genetic match between vaccine strains and circulating seasonal influenza A viruses in Vietnam, 2001-2009. Influenza Other Respir Viruses 2012; 7:1151-7. [PMID: 23137010 PMCID: PMC4634303 DOI: 10.1111/irv.12038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Please cite this paper as: Vuong et al. (2013). The genetic match between vaccine strains and circulating seasonal influenza A viruses in Vietnam, 2001–2009. Influenza and Other Respiratory Viruses 7(6), 1151–1157. Background Vietnam is currently developing domestic capability to manufacture influenza vaccines but information on the genetic and antigenic characteristics of locally circulating seasonal influenza viruses is limited. To assess the relevance of WHO recommended vaccine strains to the situation in Vietnam, we analyzed the genetic relatedness of the hemagglutinin (HA) gene of seasonal influenza A viruses circulating in Vietnam from 2001 to 2009 to WHO recommended vaccine strains over the same period. Methods and Principal findings We sequenced the HA gene of 32 H1N1 and 44 H3N2 seasonal influenza A isolates from laboratory‐based sentinel surveillance sites in Hanoi from 2001 to 2005 and from a national influenza surveillance system from 2005 to 2009. H1 and H3 HA phylogenetic trees rooted to vaccine strains A/Beijing/295/1995 (H1N1) and A/Moscow/10/1999 (H3N2), respectively, were constructed with contemporary HA sequences of isolates from neighboring countries. We found some genetic differences between seasonal influenza H3N2 viruses and three WHO influenza vaccine strains recommended for use in the Northern and Southern Hemispheres for the 2001–2004 and 2007–2008 seasons and close genetic identity of circulating H3N2 strains with the recommended WHO Southern Hemisphere vaccine strains for 2004 and 2009 seasons. The genetic similarity of circulating H1N1 strains with the WHO recommended vaccine strains are described for the study period 2001–2009. Conclusions The HA gene of seasonal influenza virus strains in Vietnam (especially influenza A/H3N2) showed varying degrees of genetic identity compared with those of the Northern or Southern Hemisphere vaccine strains recommended by WHO. The close relatedness of the HA of Vietnamese strains and contemporary strains from nearby countries indicate a good genetic match of circulating strains during study period. Greater representation of virus isolates from South East Asia in the vaccine strain selection process is desirable of influenza vaccine development in Vietnam.
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Affiliation(s)
- Cuong D Vuong
- National Influenza Center - National Institute of Hygiene and Epidemiology, Hanoi, VietnamDuke-NUS Graduate Medical School, SingaporeInfluenza Program, U.S. Centers for Disease Control and Prevention, Hanoi, Vietnam
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Skrzypski M, Kaczmarek P, Le TT, Wojciechowicz T, Pruszyńska-Oszmalek E, Szczepankiewicz D, Sassek M, Arafat A, Wiedenmann B, Nowak KW, Strowski MZ. Effects of orexin A on proliferation, survival, apoptosis and differentiation of 3T3-L1 preadipocytes into mature adipocytes. FEBS Lett 2012; 586:4157-64. [PMID: 23123090 DOI: 10.1016/j.febslet.2012.10.013] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 09/11/2012] [Accepted: 10/07/2012] [Indexed: 12/29/2022]
Abstract
Metabolic activities of orexin A (OXA) in mature adipocytes are mediated via PI3K/PKB and PPARγ. However, the effects of OXA on preadipocytes are largely unknown. We report here that OXA stimulates the proliferation and viability of 3T3-L1 preadipocytes and protects them from apoptosis via ERK1/2, but not through PKB. OXA reduces proapoptotic activity of caspase-3 via ERK1/2. Inhibition of ERK1/2 prevents the differentiation of preadipocytes into adipocytes. Unlike insulin, neither short-term nor prolonged exposure of 3T3-L1 preadipocytes to OXA induces preadipocyte differentiation to adipocytes, despite increased ERK1/2 phosphorylation. Unlike insulin, OXA fails to activate PKB, which explains its inability to induce the differentiation of preadipocytes.
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Affiliation(s)
- M Skrzypski
- Department of Hepatology and Gastroenterology & Interdisciplinary Centre of Metabolism: Endocrinology, Diabetes and Metabolism, Charité-University Medicine Berlin, 13353 Berlin, Germany; Department of Animal Physiology and Biochemistry, Poznań University of Life Sciences, 60-637 Poznań, Poland
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29
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Le TT, Van de Wiele T, Do TNH, Debyser G, Struijs K, Devreese B, Dewettinck K, Van Camp J. Stability of milk fat globule membrane proteins toward human enzymatic gastrointestinal digestion. J Dairy Sci 2012; 95:2307-18. [PMID: 22541459 DOI: 10.3168/jds.2011-4947] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2011] [Accepted: 01/09/2012] [Indexed: 11/19/2022]
Abstract
The milk fat globule membrane (MFGM) fraction refers to the thin film of polar lipids and membrane proteins that surrounds fat globules in milk. It is its unique biochemical composition that renders MFGM with some beneficial biological activities, such as anti-adhesive effects toward pathogens. However, a prerequisite for the putative bioactivity of MFGM is its stability during gastrointestinal digestion. We, therefore, subjected MFGM material, isolated from raw milk, to an in vitro enzymatic gastrointestinal digestion. Sodium dodecyl sulfate PAGE, in combination with 2 staining methods, Coomassie Blue and periodic acid Schiff staining, was used to evaluate polypeptide patterns of the digest, whereas mass spectrometry was used to confirm the presence of specific MFGM proteins. Generally, it was observed that glycoproteins showed higher resistance to endogenous proteases compared with non-glycosylated proteins. Mucin 1 displayed the highest resistance to digestion and a considerable part of this protein was still detected at its original molecular weight after gastric and small intestine digestion. Cluster of differentiation 36 was also quite resistant to pepsin. A significant part of periodic acid Schiff 6/7 survived the gastric digestion, provided that the lipid moiety was not removed from the MFGM material. Overall, MFGM glycoproteins are generally more resistant to gastrointestinal digestion than serum milk proteins and the presence of lipids, besides glycosylation, may protect MFGM glycoproteins from gastrointestinal digestion. This gastrointestinal stability makes MFGM glycoproteins amenable to further studies in which their putative health-promoting effects can be explored.
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Affiliation(s)
- T T Le
- Department of Food Safety and Food Quality, Ghent University, Ghent, Belgium
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30
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Salameh TS, Le TT, Nichols MB, Bauer E, Cheng J, Camarillo IG. An ex vivo co-culture model system to evaluate stromal-epithelial interactions in breast cancer. Int J Cancer 2012; 132:288-96. [PMID: 22696278 DOI: 10.1002/ijc.27672] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 05/08/2012] [Indexed: 12/29/2022]
Abstract
Breast cancer is the most commonly diagnosed cancer among women worldwide. High breast cancer incidence and mortality rates, especially in obese patients, emphasize the need for a better biological understanding of this disease. Previous studies provide substantial evidence for a vital role of the local extracellular environment in multiple steps of tumor progression, including proliferation and invasion. Current evidence supports the role of adipocytes as an endocrine organ, which produces steroid hormones, pro-inflammatory cytokines and adipokines, such as leptin. To further define the role of the mammary microenvironment on tumorigenesis, we have developed an adipose-tumor epithelial cell co-culture system designed to reproduce the in vivo mammary environment. We validate this model through use of coherent anti-Stokes Raman scattering (CARS) microscopy, a label-free vibrational imaging technique. CARS analysis demonstrates the sustained viability of the adipocytes, and that mammary cancer cell morphology parallels that of tumors in vivo. Also, characterized was the influence of mammary adipose tissue on tumor cell growth and migration. Adipose tissue co-cultured with mammary tumor epithelial cells, in the absence of any serum or supplemental growth factors, resulted in substantial increases in growth and migration of tumor cells. In conclusion, this novel co-culture system provides an ideal model to study epithelial-stromal interactions in the mammary gland. Understanding the relationship between adipose tissue, the most abundant and least studied component of the breast stroma and tumor epithelial cells is critical to clarifying the influence of obesity on the development, progression and prognosis of breast cancer.
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Affiliation(s)
- T S Salameh
- Department of Biological Sciences, Purdue University, West Lafayette, IN 49706, USA
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Le TT, Fischbein NJ, André JB, Wijman C, Rosenberg J, Zaharchuk G. Identification of venous signal on arterial spin labeling improves diagnosis of dural arteriovenous fistulas and small arteriovenous malformations. AJNR Am J Neuroradiol 2011; 33:61-8. [PMID: 22158927 DOI: 10.3174/ajnr.a2761] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE DAVFs and small AVMs are difficult to detect on conventional MR imaging/MRA or CTA examinations and often require DSA for definitive diagnosis. The purpose of this study was to assess the value of venous signal intensity on ASL imaging for making this diagnosis. MATERIALS AND METHODS Two neuroradiologists and 1 neurologist reviewed MR imaging studies in 26 patients, 15 of whom had DSA-proved DAVFs or small (<2 cm) AVMs. Pseudocontinuous ASL was performed at 1.5T with background-suppressed 3D-FSE readout. Using a 5-point scale, these readers assessed the likelihood of positive findings on a DSA study before and after reviewing the ASL findings. Agreement on imaging findings, including venous ASL signal intensity, was performed by using κ statistics. Logistic regression and ROC analysis were performed to determine which imaging findings improved diagnosis. RESULTS Venous ASL signal intensity was seen frequently in cases with positive findings on DSA. The sensitivity and specificity of venous ASL signal intensity for predicting positive findings on a DSA study were 78% and 85%, respectively. On ROC analysis, there was a significant increase in the AUC after review of the ASL images (AUC = 0.798 pre-ASL, AUC = 0.891 post-ASL; P = .02). Multivariate regression identified venous ASL signal intensity as the strongest predictor of positive findings on a DSA study, with an odds ratio of 17.3 (95% CI, 3.3-90.4). CONCLUSIONS Identifying venous ASL signal intensity improved detection of DAVFs and small AVMs. Attention to this finding may improve triage to DSA in patients with suspected small vascular malformations.
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Affiliation(s)
- T T Le
- Department of Radiology, Stanford University, CA, USA
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Skrzypski M, T Le T, Kaczmarek P, Pruszynska-Oszmalek E, Pietrzak P, Szczepankiewicz D, Kolodziejski PA, Sassek M, Arafat A, Wiedenmann B, Nowak KW, Strowski MZ. Orexin A stimulates glucose uptake, lipid accumulation and adiponectin secretion from 3T3-L1 adipocytes and isolated primary rat adipocytes. Diabetologia 2011; 54:1841-52. [PMID: 21505958 DOI: 10.1007/s00125-011-2152-2] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [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: 03/10/2011] [Accepted: 03/17/2011] [Indexed: 10/18/2022]
Abstract
AIMS/HYPOTHESIS Orexin A (OXA) modulates body weight, food intake and energy expenditure. In vitro, OXA increases PPARγ (also known as PPARG) expression and inhibits lipolysis, suggesting direct regulation of lipid metabolism. Here, we characterise the metabolic effects and mechanisms of OXA action in adipocytes. METHODS Isolated rat adipocytes and differentiated murine 3T3-L1 adipocytes were exposed to OXA in the presence or absence of phosphoinositide 3-kinase (PI3K) inhibitors. Pparγ expression was silenced using small interfering RNA. Glucose uptake, GLUT4 translocation, phosphatidylinositol (3,4,5)-trisphosphate production, lipogenesis, lipolysis, and adiponectin secretion were measured. Adiponectin plasma levels were determined in rats treated with OXA for 4 weeks. RESULTS OXA PI3K-dependently stimulated active glucose uptake by translocating the glucose transporter GLUT4 from cytoplasm into the plasma membrane. OXA increased cellular triacylglycerol content via PI3K. Cellular triacylglycerol accumulation resulted from increased lipogenesis as well as from a decrease of lipolysis. Adiponectin levels in chow- and high-fat diet-fed rats treated chronically with OXA were increased. OXA stimulated adiponectin expression and secretion in adipocytes. Both pharmacological blockade of peroxisome proliferator-activated receptor γ (PPARγ) activity or silencing Pparγ expression prevented OXA from stimulating triacylglycerol accumulation and adiponectin production. CONCLUSIONS/INTERPRETATION Our study demonstrates that OXA stimulates glucose uptake in adipocytes and that the evolved energy is stored as lipids. OXA increases lipogenesis, inhibits lipolysis and stimulates the secretion of adiponectin. These effects are conferred via PI3K and PPARγ2. Overall, OXA's effects on lipids and adiponectin secretion resemble that of insulin sensitisers, suggesting a potential relevance of this peptide in metabolic disorders.
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Affiliation(s)
- M Skrzypski
- Department of Hepatology and Gastroenterology and Interdisciplinary Centre of Metabolism: Endocrinology, Diabetes and Metabolism, Charité-University Medicine Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
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33
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Le TT, McGovern VL, Alwine IE, Wang X, Massoni-Laporte A, Rich MM, Burghes AHM. Temporal requirement for high SMN expression in SMA mice. Hum Mol Genet 2011; 20:3578-91. [PMID: 21672919 DOI: 10.1093/hmg/ddr275] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Spinal muscular atrophy (SMA) is caused by loss of the survival motor neuron 1 gene (SMN1) and retention of the SMN2 gene, resulting in reduced SMN. SMA mice can be rescued with high expression of SMN in neurons, but when is this high expression required? We have developed a SMA mouse with inducible expression of SMN to address the temporal requirement for high SMN expression. Both embryonic and early postnatal induction of SMN resulted in a dramatic increase in survival with some mice living greater than 200 days. The mice had no marked motor deficits and neuromuscular junction (NMJ) function was near normal thus it appears that induction of SMN in postnatal SMA mice rescues motor function. Early postnatal SMN induction, followed by a 1-month removal of induction at 28 days of age, resulted in no morphological or electrophysiological abnormalities at the NMJ and no overt motor phenotype. Upon removal of SMN induction, five mice survived for just over 1 month and two female mice have survived past 8 months of age. We suggest that there is a postnatal period of time when high SMN levels are required. Furthermore, two copies of SMN2 provide the minimal amount of SMN necessary to maintain survival during adulthood. Finally, in the course of SMA, early induction of SMN is most efficacious.
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Affiliation(s)
- Thanh T Le
- Department of Molecular and Cellular Biochemistry, The Ohio State University, Columbus, OH 43210, USA
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Schroder WA, Gardner J, Le TT, Duke M, Burke ML, Jones MK, McManus DP, Suhrbier A. SerpinB2 deficiency modulates Th1⁄Th2 responses after schistosome infection. Parasite Immunol 2011; 32:764-8. [PMID: 21086717 DOI: 10.1111/j.1365-3024.2010.01241.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
SerpinB2, also known as plasminogen activator inhibitor type-2, is a major product of macrophages and is upregulated during many infections. Although SerpinB2 inhibits urokinase plasminogen activator in vitro, evidence that this represents its physiological role in vivo is not compelling. We have recently shown that SerpinB2-/-mice generate enhanced Th1 responses after immunization with a Th1 immunogen. Herein,we show that Schistosoma japonicum granulomas induced liver SerpinB2 mRNA expression by >600-fold in wild-type mice. In SerpinB2-/- mice, worm and egg burden, and granuloma number and volume were unaffected. However, granulomas in these mice were associated with reduced fibrosis (as determined by Sirius red staining and image analysis) and increased iNOS, IL-6, IL-10 and TNFa and decreased Arg 1 and IL-13 mRNA expression. SerpinB2-/- mice immunized with soluble egg antigen (SEA) also showed reduced levels of SEA-specific IgG1. SerpinB2 deficiency thus promoted certain Th1 and reduced certain Th2 responses in response to this Th2 immunogen.
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Affiliation(s)
- W A Schroder
- Queensland Institute of Medical Research, Brisbane, Qld., Australia
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35
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Le TT, Miocinovic J, Van Camp J, Devreese B, Strijs K, Vande WT, Dewettinck K. Isolation and applications of milk fat globule membrane material: isolation from buttermilk and butter serum. Commun Agric Appl Biol Sci 2011; 76:111-114. [PMID: 21539210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- T T Le
- Department of Food Safety and Food Quality, Ghent University, Coupure Links 653, 9000 Gent, Belgium
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36
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Boaz NC, Bair NC, Le TT, Peelen TJ. Activation of Fmoc-protected N,O-acetals using trimethylsilyl halides: mechanistic and synthetic studies. Org Lett 2010; 12:2464-7. [PMID: 20438093 DOI: 10.1021/ol100494z] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Trimethylsilyl halide activation of Fmoc-protected N,O-acetals yields reactive intermediates capable of efficiently adding to a variety of enamines. NMR studies have provided evidence that a stable halomethyl carbamate intermediate forms in solution. Good yields are obtained over a broad range of enamine nucleophiles encompassing both cyclic and acyclic ketone-derived and aldehyde-derived enamines. Preliminary studies suggest that the enamine additions occur through a concerted, S(N)2-type mechanism.
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Affiliation(s)
- Nicholas C Boaz
- Department of Chemistry, Lebanon Valley College, Annville, Pennsylvania 17003, USA
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Hoang-Le D, Smeenk L, Anraku I, Pijlman GP, Wang XJ, de Vrij J, Liu WJ, Le TT, Schroder WA, Khromykh AA, Suhrbier A. A Kunjin replicon vector encoding granulocyte macrophage colony-stimulating factor for intra-tumoral gene therapy. Gene Ther 2008; 16:190-9. [PMID: 19092857 DOI: 10.1038/gt.2008.169] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We have recently developed a non-cytopathic RNA replicon-based viral vector system based on the flavivirus Kunjin. Here, we illustrate the utility of the Kunjin replicon system for gene therapy. Intra-tumoral injections of Kunjin replicon virus-like particles encoding granulocyte colony-stimulating factor were able to cure >50% of established subcutaneous CT26 colon carcinoma and B16-OVA melanomas. Regression of CT26 tumours correlated with the induction of anti-cancer CD8 T cells, and treatment of subcutaneous CT26 tumours also resulted in the regression of CT26 lung metastases. Only a few immune-based strategies are able to cure these aggressive tumours once they are of a reasonable size, illustrating the potential of this vector system for intra-tumoral gene therapy applications.
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Affiliation(s)
- D Hoang-Le
- Queensland Institute of Medical Research, PO Royal Brisbane Hospital, Brisbane, Queensland, Australia
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Le TT, Rombaut R, Dewettink K. Effect of washing steps on the recovery of milk fat globule membrane material isolated from milk. Commun Agric Appl Biol Sci 2007; 72:229-233. [PMID: 18018893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Affiliation(s)
- T T Le
- Laboratory of Food Technology and Engineering, Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Belgium
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Sharma A, Lambrechts A, Hao LT, Le TT, Sewry CA, Ampe C, Burghes AHM, Morris GE. A role for complexes of survival of motor neurons (SMN) protein with gemins and profilin in neurite-like cytoplasmic extensions of cultured nerve cells. Exp Cell Res 2005; 309:185-97. [PMID: 15975577 DOI: 10.1016/j.yexcr.2005.05.014] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2004] [Revised: 05/06/2005] [Accepted: 05/11/2005] [Indexed: 10/25/2022]
Abstract
Spinal muscular atrophy (SMA) is caused by reduced levels of SMN (survival of motor neurons protein) and consequent loss of motor neurons. SMN is involved in snRNP transport and nuclear RNA splicing, but axonal transport of SMN has also been shown to occur in motor neurons. SMN also binds to the small actin-binding protein, profilin. We now show that SMN and profilin II co-localise in the cytoplasm of differentiating rat PC12 cells and in neurite-like extensions, especially at their growth cones. Many components of known SMN complexes were also found in these extensions, including gemin2 (SIP-1), gemin6, gemin7 and unrip (unr-interacting protein). Coilin p80 and Sm core protein immunoreactivity, however, were seen only in the nucleus. SMN is known to associate with beta-actin mRNA and specific hnRNPs in axons and in neurite extensions of cultured nerve cells, and SMN also stimulates neurite outgrowth in cultures. Our results are therefore consistent with SMN complexes, rather than SMN alone, being involved in the transport of actin mRNPs along the axon as in the transport of snRNPs into the nucleus by similar SMN complexes. Antisense knockdown of profilin I and II isoforms inhibited neurite outgrowth of PC12 cells and caused accumulation of SMN and its associated proteins in cytoplasmic aggregates. BIAcore studies demonstrated a high affinity interaction of SMN with profilin IIa, the isoform present in developing neurons. Pathogenic missense mutations in SMN, or deletion of exons 5 and 7, prevented this interaction. The interaction is functional in that SMN can modulate actin polymerisation in vitro by reducing the inhibitory effect of profilin IIa. This suggests that reduced SMN in SMA might cause axonal pathfinding defects by disturbing the normal regulation of microfilament growth by profilins.
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Affiliation(s)
- Aarti Sharma
- Biochemistry Group, N. E. Wales Institute, Mold Road, Wrexham LL11 2AW, UK
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40
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Le TT, Pham LT, Butchbach MER, Zhang HL, Monani UR, Coovert DD, Gavrilina TO, Xing L, Bassell GJ, Burghes AHM. SMNDelta7, the major product of the centromeric survival motor neuron (SMN2) gene, extends survival in mice with spinal muscular atrophy and associates with full-length SMN. Hum Mol Genet 2005; 14:845-57. [PMID: 15703193 DOI: 10.1093/hmg/ddi078] [Citation(s) in RCA: 472] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Spinal muscular atrophy (SMA) is an autosomal recessive disorder in humans which results in the loss of motor neurons. It is caused by reduced levels of the survival motor neuron (SMN) protein as a result of loss or mutation of the SMN1 gene. SMN is encoded by two genes, SMN1 and SMN2, which essentially differ by a single nucleotide in exon 7. As a result, the majority of the transcript from SMN2 lacks exon 7 (SMNDelta7). SMNDelta7 may be toxic and detrimental in SMA, which, if true, could lead to adverse effects with drugs that stimulate expression of SMN2. To determine the role of SMNDelta7 in SMA, we created transgenic mice expressing SMNDelta7 and crossed them onto a severe SMA background. We found that the SMNDelta7 is not detrimental in that it extends survival of SMA mice from 5.2 to 13.3 days. Unlike mice with selective deletion of SMN exon 7 in muscle, these mice with a small amount of full-length SMN (FL-SMN) did not show a dystrophic phenotype. This indicates that low levels of FL-SMN as found in SMA patients and absence of FL-SMN in muscle tissue have different effects and raises the question of the importance of high SMN levels in muscle in the presentation of SMA. SMN and SMNDelta7 can associate with each other and we suggest that this association stabilizes SMNDelta7 protein turnover and ameliorates the SMA phenotype by increasing the amount of oligomeric SMN. The increased survival of the SMNDelta7 SMA mice we report will facilitate testing of therapies and indicates the importance of considering co-complexes of SMN and SMNDelta7 when analyzing SMN function.
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Affiliation(s)
- Thanh T Le
- Department of Molecular and Cellular Biochemistry, College of Medicine and Public Health, Ohio State University, Columbus, OH 43210, USA
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41
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Monani UR, Pastore MT, Gavrilina TO, Jablonka S, Le TT, Andreassi C, DiCocco JM, Lorson C, Androphy EJ, Sendtner M, Podell M, Burghes AHM. A transgene carrying an A2G missense mutation in the SMN gene modulates phenotypic severity in mice with severe (type I) spinal muscular atrophy. J Cell Biol 2003; 160:41-52. [PMID: 12515823 PMCID: PMC2172739 DOI: 10.1083/jcb.200208079] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
5q spinal muscular atrophy (SMA) is a common autosomal recessive disorder in humans and the leading genetic cause of infantile death. Patients lack a functional survival of motor neurons (SMN1) gene, but carry one or more copies of the highly homologous SMN2 gene. A homozygous knockout of the single murine Smn gene is embryonic lethal. Here we report that in the absence of the SMN2 gene, a mutant SMN A2G transgene is unable to rescue the embryonic lethality. In its presence, the A2G transgene delays the onset of motor neuron loss, resulting in mice with mild SMA. We suggest that only in the presence of low levels of full-length SMN is the A2G transgene able to form partially functional higher order SMN complexes essential for its functions. Mild SMA mice exhibit motor neuron degeneration, muscle atrophy, and abnormal EMGs. Animals homozygous for the mutant transgene are less severely affected than heterozygotes. This demonstrates the importance of SMN levels in SMA even if the protein is expressed from a mutant allele. Our mild SMA mice will be useful in (a) determining the effect of missense mutations in vivo and in motor neurons and (b) testing potential therapies in SMA.
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MESH Headings
- Animals
- Axons/metabolism
- Blotting, Southern
- Blotting, Western
- Cyclic AMP Response Element-Binding Protein
- DNA, Complementary/metabolism
- Dose-Response Relationship, Drug
- Electromyography
- Electrophysiology
- Genotype
- Glutathione Transferase/metabolism
- Homozygote
- Immunohistochemistry
- Mice
- Mice, Knockout
- Mice, Transgenic
- Models, Biological
- Models, Genetic
- Motor Neurons/pathology
- Muscles/cytology
- Muscles/metabolism
- Muscles/pathology
- Muscular Atrophy, Spinal/genetics
- Mutation
- Mutation, Missense
- Nerve Tissue Proteins/genetics
- Phenotype
- Protein Binding
- RNA-Binding Proteins
- Reverse Transcriptase Polymerase Chain Reaction
- SMN Complex Proteins
- Survival of Motor Neuron 1 Protein
- Survival of Motor Neuron 2 Protein
- Time Factors
- Tissue Distribution
- Transgenes
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Affiliation(s)
- Umrao R Monani
- Department of Neurology, Ohio State University, Columbus, OH 43210, USA.
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42
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Silins SL, Sherritt MA, Silleri JM, Cross SM, Elliott SL, Bharadwaj M, Le TT, Morrison LE, Khanna R, Moss DJ, Suhrbier A, Misko IS. Asymptomatic primary Epstein-Barr virus infection occurs in the absence of blood T-cell repertoire perturbations despite high levels of systemic viral load. Blood 2001; 98:3739-44. [PMID: 11739180 DOI: 10.1182/blood.v98.13.3739] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.8] [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: 01/31/2023] Open
Abstract
Primary infection with the human herpesvirus, Epstein-Barr virus (EBV), may result in subclinical seroconversion or may appear as infectious mononucleosis (IM), a lymphoproliferative disease of variable severity. Why primary infection manifests differently between patients is unknown, and, given the difficulties in identifying donors undergoing silent seroconversion, little information has been reported. However, a longstanding assumption has been held that IM represents an exaggerated form of the virologic and immunologic events of asymptomatic infection. T-cell receptor (TCR) repertoires of a unique cohort of subclinically infected patients undergoing silent infection were studied, and the results highlight a fundamental difference between the 2 forms of infection. In contrast to the massive T-cell expansions mobilized during the acute symptomatic phase of IM, asymptomatic donors largely maintain homeostatic T-cell control and peripheral blood repertoire diversity. This disparity cannot simply be linked to severity or spread of the infection because high levels of EBV DNA were found in the blood from both types of acute infection. The results suggest that large expansions of T cells within the blood during IM may not always be associated with the control of primary EBV infection and that they may represent an overreaction that exacerbates disease.
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Affiliation(s)
- S L Silins
- Infectious Disease and Immunology Division, Queensland Institute of Medical Research, Herston, Australia.
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43
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Abstract
CD8 alphabeta cytotoxic T lymphocyte (CTL) polyepitope or polytope vaccines have traditionally been delivered using recombinant vector or DNA based delivery modalities. Here we show the delivery of polytope vaccines in the form of either synthetic polypeptides or recombinant polytope proteins by ImmunoStimulatory COMplexes (ISCOMs(R)). Induction of multiple protective CTL responses by these polytope-ISCOM formulations were comparable to viral vector or DNA based delivery modalities as assessed by IFNgamma ELISpot, chromium release and viral challenge assays. Measurement of CTL responses specific for the different epitopes revealed immunodominance patterns, which were largely independent of the vaccine vector or the order of the epitopes in the polytope. ISCOMs thus emerge as a viable human delivery modality for protein-based polytope vaccines.
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Affiliation(s)
- T T Le
- Cooperative Research Centre for Vaccine Technology, Australian National Centre for International and Tropical Health and Nutrition, Queensland Institute of Medical Research and the University of Queensland, Post Office Royal Brisbane Hospital, Brisbane
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Abstract
OBJECTIVE To investigate patterns of drug use and injection-related risk behaviours among young Indo-Chinese injecting drug users (IDUs). METHOD Cross-sectional survey. A structured questionnaire was administered to 184 Indo-Chinese IDUs aged 15 to 24 in Sydney and Melbourne. Participants were recruited using snowball sampling techniques; measures included patterns of heroin and other drug use, injection-related risk behaviours, perceived susceptibility to HIV and HCV infection and access to services. RESULTS Despite perceived high availability of sterile injecting equipment, 36% had ever shared a needle and syringe and 22% had done so in the preceding month. Lifetime sharing was significantly associated with duration of injecting, history of incarceration and residence in Sydney. Sharing of injecting paraphernalia other than needles and syringes was also common, with young women and Sydney residents significantly more likely to report sharing equipment in the preceding month. CONCLUSIONS Young Indo-Chinese IDUs are at high risk of infection with hepatitis C and other blood-borne viruses. Results indicate an urgent need for culturally appropriate and sustainable risk reduction programs which specifically target this population. IMPLICATIONS Health services must respond swiftly to implement effective blood-borne virus prevention programs for young Indo-Chinese IDUs. Failure to do so may sustain the current epidemic of hepatitis C among IDUs.
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Affiliation(s)
- L Maher
- School of Medical Education, University of New South Wales.
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Young PJ, Le TT, Dunckley M, Nguyen TM, Burghes AH, Morris GE. Nuclear gems and Cajal (coiled) bodies in fetal tissues: nucleolar distribution of the spinal muscular atrophy protein, SMN. Exp Cell Res 2001; 265:252-61. [PMID: 11302690 DOI: 10.1006/excr.2001.5186] [Citation(s) in RCA: 112] [Impact Index Per Article: 4.9] [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: 11/22/2022]
Abstract
SMN, the affected protein in spinal muscular atrophy (SMA), is a cytoplasmic protein that also occurs in nuclear structures called "gems" and is involved in snRNP maturation. Coilin-p80 is a marker protein for nuclear Cajal bodies (coiled bodies; CBs) which are also involved in snRNP maturation, storage or transport. We now show that gems and CBs are present in all fetal tissues, even those that lack gems/CBs in the adult. Most gems and CBs occur as separate nuclear structures in fetal tissues, but their colocalization increases with fetal age and is almost complete in the adult. In adult tissues, up to half of all gems/CBs are inside the nucleolus, whereas in cultured cells they are almost exclusively nucleoplasmic. The nucleolar SMN is often more diffusely distributed, compared with nucleoplasmic gems. Up to 30% of cells in fetal tissues have SMN distributed throughout the nucleolus, instead of forming gems in the nucleoplasm. The results suggest a function for gems distinct from Cajal bodies in fetal nuclei and a nucleolar function for SMN. Spinal cord, the affected tissue in SMA, behaves differently in several respects. In both fetal and adult motor neurons, many gems/CBs occur as larger bodies closely associated with the nucleolar perimeter. Uniquely in motor neurons, gems/CBs are more numerous in adult than in fetal stages and colocalization of gems and CBs occurs earlier in development. These unusual features of motor neurons may relate to their special sensitivity to reduced SMN levels in SMA patients.
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Affiliation(s)
- P J Young
- MRIC Biochemistry Group, North East Wales Institute, Mold Road, Wrexham LL11 2AW, United Kingdom
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Young PJ, Man NT, Lorson CL, Le TT, Androphy EJ, Burghes AH, Morris GE. The exon 2b region of the spinal muscular atrophy protein, SMN, is involved in self-association and SIP1 binding. Hum Mol Genet 2000; 9:2869-77. [PMID: 11092763 DOI: 10.1093/hmg/9.19.2869] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Spinal muscular atrophy (SMA) is caused by mutations in the SMN (survival of motor neurons) gene and there is a correlation between disease severity and levels of functional SMN protein. Studies of structure-function relationships in SMN protein may lead to a better understanding of SMA pathogenesis. Self-association of the spinal muscular atrophy protein, SMN, is important for its function in RNA splicing. Biomolecular interaction analysis core analysis now shows that SMN self-association occurs via SMN regions encoded by exons 2b and 6, that exon 2b encodes a binding site for SMN-interacting protein-1 and that interaction occurs between exon 2- and 4-encoded regions within the SMN monomer. The presence of two separate self-association sites suggests a novel mechanism by which linear oligomers or closed rings might be formed from SMN monomers.
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Affiliation(s)
- P J Young
- MRIC Biochemistry Group, North East Wales Institute, Mold Road, Wrexham LL11 2AW, UK
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Le TT, Coovert DD, Monani UR, Morris GE, Burghes AH. The survival motor neuron (SMN) protein: effect of exon loss and mutation on protein localization. Neurogenetics 2000; 3:7-16. [PMID: 11085591 DOI: 10.1007/s100480000090] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [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: 11/30/2022]
Abstract
Spinal muscular atrophy (SMA) is caused by mutations in the telomeric copy of the survival motor neuron gene (SMN1) but not mutations in the centromeric copy (SMN2). The critical difference between the two genes is a nucleotide difference in exon 7 that affects splicing and causes this exon to be spliced out of most SMN2 transcripts. A majority of the SMN1 gene transcripts contain exon 7. To investigate the effect of exon loss or mutations in SMN on protein localization, 15 SMN constructs were prepared and transfected into COS-7 cells and fibroblasts derived from a type I SMA patient. Loss of exon 5 (Iso5-SMN), a putative nuclear localization signal in exon 2, and the G279V point mutation had little effect on SMN localization. Loss of both exons 5 and 7 (Iso57-SMN) resulted in low gem numbers and the localization of the majority of the SMN protein to the cytoplasm. Cells expressing constructs lacking only exon 7 (Iso7-SMN) did not produce large numbers of gems in general, although there were a few cells that had a staining pattern similar to cells transfected with a full-length (Full-SMN) construct. HeLa cells stably transfected with full-length SMN or Iso7-SMN did not overexpress SMN, and both constructs produced a similar localization of the protein, although Iso7-SMN formed gems less efficiently. Removal of the amino-terminus, deletion of the conserved domain in exon 2A, and the mutation Y272C all caused accumulation of SMN in the nucleus, sometimes in large aggregates. These findings suggest that the amino-terminal domain of SMN is essential for the correct cellular distribution of SMN, whereas Iso7-SMN is capable of forming gems, albeit at a reduced efficiency.
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Affiliation(s)
- T T Le
- Department of Medical Biochemistry, Ohio State University, Columbus 43210, USA
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Coovert DD, Le TT, Morris GE, Man NT, Kralewski M, Sendtner M, Burghes AH. Does the survival motor neuron protein (SMN) interact with Bcl-2? J Med Genet 2000; 37:536-9. [PMID: 10970187 PMCID: PMC1734632 DOI: 10.1136/jmg.37.7.536] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Bartlett RJ, Stockinger S, Denis MM, Bartlett WT, Inverardi L, Le TT, thi Man N, Morris GE, Bogan DJ, Metcalf-Bogan J, Kornegay JN. In vivo targeted repair of a point mutation in the canine dystrophin gene by a chimeric RNA/DNA oligonucleotide. Nat Biotechnol 2000; 18:615-22. [PMID: 10835598 DOI: 10.1038/76448] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.5] [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: 11/08/2022]
Abstract
In the canine model of Duchenne muscular dystrophy in golden retrievers (GRMD), a point mutation within the splice acceptor site of intron 6 leads to deletion of exon 7 from the dystrophin mRNA, and the consequent frameshift causes early termination of translation. We have designed a DNA and RNA chimeric oligonucleotide to induce host cell mismatch repair mechanisms and correct the chromosomal mutation to wild type. Direct skeletal muscle injection of the chimeric oligonucleotide into the cranial tibialis compartment of a six-week-old affected male dog, and subsequent analysis of biopsy and necropsy samples, demonstrated in vivo repair of the GRMD mutation that was sustained for 48 weeks. Reverse transcription-polymerase chain reaction (RT-PCR) analysis of exons 5-10 demonstrated increasing levels of exon 7 inclusion with time. An isolated exon 7-specific dystrophin antibody confirmed synthesis of normal-sized dystrophin product and positive localization to the sarcolemma. Chromosomal repair in muscle tissue was confirmed by restriction fragment length polymorphism (RFLP)-PCR and sequencing the PCR product. This work provides evidence for the long-term repair of a specific dystrophin point mutation in muscle of a live animal using a chimeric oligonucleotide.
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Affiliation(s)
- R J Bartlett
- Department of Veterinary Medicine and Surgery, Dalton Cardiovascular Research Center, College of Veterinary Medicine, Columbia, MO 65202, USA.
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Young PJ, Le TT, thi Man N, Burghes AH, Morris GE. The relationship between SMN, the spinal muscular atrophy protein, and nuclear coiled bodies in differentiated tissues and cultured cells. Exp Cell Res 2000; 256:365-74. [PMID: 10772809 DOI: 10.1006/excr.2000.4858] [Citation(s) in RCA: 161] [Impact Index Per Article: 6.7] [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: 01/03/2023]
Abstract
The spinal muscular atrophy protein, SMN, is a cytoplasmic protein that is also found in distinct nuclear structures called "gems." Gems are closely associated with nuclear coiled bodies and both may have a direct role in snRNP maturation and pre-RNA splicing. There has been some controversy over whether gems and coiled bodies colocalize or form adjacent/independent structures in HeLa and other cultured cells. Using a new panel of antibodies against SMN and antibodies against coilin-p80, a systematic and quantitative study of adult differentiated tissues has shown that gems always colocalize with coiled bodies. In some tissues, a small proportion of coiled bodies (<10%) had no SMN, but independent or adjacent gems were not found. The most striking observation, however, was that many cell types appear to have neither gems nor coiled bodies (e.g., cardiac and smooth muscle, blood vessels, stomach, and spleen) and this expression pattern is conserved across human, rabbit, and pig species. This shows that assembly of distinct nuclear bodies is not essential for RNA splicing and supports the view that they may be storage sites for reserves of essential proteins and snRNPs. Overexpression of SMN in COS-7 cells produced supernumerary nuclear bodies, most of which also contained coilin-p80, confirming the close relationship between gems and coiled bodies. However, when SMN is reduced to very low levels in type I SMA fibroblasts, coiled bodies are still formed. Overall, the data suggest that gem/coiled body formation is not determined by high cytoplasmic SMN concentrations or high metabolic activity alone and that a differentiation-specific factor may control their formation.
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Affiliation(s)
- P J Young
- MRIC Biochemistry Group, North East Wales Institute, Mold Road, Wrexham, LL11 2AW, United Kingdom
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