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Le LTH, Hoang TNA, Nguyen TT, Dao TD, Do BN, Pham KM, Vu VH, Pham LV, Nguyen LTH, Nguyen HC, Tran TV, Nguyen TH, Nguyen AT, Nguyen HV, Nguyen PB, Nguyen HTT, Pham TTM, Le TT, Nguyen TTP, Tran CQ, Quach HL, Nguyen KT, Duong TV. Sex Differences in Clustering Unhealthy Lifestyles Among Survivors of COVID-19: Latent Class Analysis. JMIR Public Health Surveill 2024; 10:e50189. [PMID: 38564248 PMCID: PMC10989720 DOI: 10.2196/50189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 12/22/2023] [Accepted: 01/30/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND The COVID-19 pandemic has underscored the significance of adopting healthy lifestyles to mitigate the risk of severe outcomes and long-term consequences. OBJECTIVE This study focuses on assessing the prevalence and clustering of 5 unhealthy lifestyle behaviors among Vietnamese adults after recovering from COVID-19, with a specific emphasis on sex differences. METHODS The cross-sectional data of 5890 survivors of COVID-19 in Vietnam were analyzed from December 2021 to October 2022. To examine the sex differences in 5 unhealthy lifestyle behaviors (smoking, drinking, unhealthy diet, physical inactivity, and sedentary behavior), the percentages were plotted along with their corresponding 95% CI for each behavior. Latent class analysis was used to identify 2 distinct classes of individuals based on the clustering of these behaviors: the "less unhealthy" group and the "more unhealthy" group. We examined the sociodemographic characteristics associated with each identified class and used logistic regression to investigate the factors related to the "more unhealthy" group. RESULTS The majority of individuals (male participants: 2432/2447, 99.4% and female participants: 3411/3443, 99.1%) exhibited at least 1 unhealthy behavior, with male participants being more susceptible to multiple unhealthy behaviors. The male-to-female ratio for having a single behavior was 1.003, but it escalated to 25 for individuals displaying all 5 behaviors. Male participants demonstrated a higher prevalence of combining alcohol intake with sedentary behavior (949/2447, 38.8%) or an unhealthy diet (861/2447, 35.2%), whereas female participants tended to exhibit physical inactivity combined with sedentary behavior (1305/3443, 37.9%) or an unhealthy diet (1260/3443, 36.6%). Married male participants had increased odds of falling into the "more unhealthy" group compared to their single counterparts (odds ratio [OR] 1.45, 95% CI 1.14-1.85), while female participants exhibited lower odds (OR 0.65, 95% CI 0.51-0.83). Female participants who are underweight showed a higher likelihood of belonging to the "more unhealthy" group (OR 1.11, 95% CI 0.89-1.39), but this was not observed among male participants (OR 0.6, 95% CI 0.41-0.89). In both sexes, older age, dependent employment, high education, and obesity were associated with higher odds of being in the "more unhealthy" group. CONCLUSIONS The study identified notable sex differences in unhealthy lifestyle behaviors among survivors of COVID-19. Male survivors are more likely to engage in unhealthy behaviors compared to female survivors. These findings emphasize the importance of tailored public health interventions targeting sex-specific unhealthy behaviors. Specifically, addressing unhealthy habits is crucial for promoting post-COVID-19 health and well-being.
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Affiliation(s)
- Lan T H Le
- Director Office, Thai Nguyen National Hospital, Thai Nguyen, Vietnam
- Training and Direction of Healthcare Activity Center, Thai Nguyen National Hospital, Thai Nguyen, Vietnam
- Biochemistry Department, Thai Nguyen National Hospital, Thai Nguyen, Vietnam
| | | | - Tan T Nguyen
- Department of Orthopedics, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam
- Director Office, Can Tho University of Medicine and Pharmacy Hospital, Can Tho, Vietnam
| | - Tien D Dao
- Institute of Oncology and Nuclear Medicine, Military Hospital 175, Ho Chi Minh City, Vietnam
| | - Binh N Do
- Department of Infectious Diseases, Vietnam Military Medical University, Ha Noi, Vietnam
- Department of Military Science, Vietnam Military Medical University, Ha Noi, Vietnam
| | - Khue M Pham
- Faculty of Public Health, Hai Phong University of Medicine and Pharmacy, Hai Phong, Vietnam
| | - Vinh H Vu
- Infectious and Tropical Diseases Department, Viet Tiep Hospital, Hai Phong, Vietnam
| | - Linh V Pham
- Department of Pulmonary and Cardiovascular Diseases, Hai Phong University of Medicine and Pharmacy Hospital, Hai Phong, Vietnam
| | - Lien T H Nguyen
- Department of Pulmonary and Cardiovascular Diseases, Hai Phong University of Medicine and Pharmacy Hospital, Hai Phong, Vietnam
| | - Hoang C Nguyen
- Director Office, Thai Nguyen National Hospital, Thai Nguyen, Vietnam
- President Office, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen, Vietnam
| | - Tuan V Tran
- Neurology Department, Thai Nguyen University of Medicine and Pharmacy, Thai Nguyen, Vietnam
| | - Trung H Nguyen
- Director Office, Gang Thep Hospital, Thai Nguyen, Vietnam
| | - Anh T Nguyen
- Director Office, Hospital for Tropical Diseases, Hai Duong, Vietnam
| | - Hoan V Nguyen
- Infectious and Tropical Diseases Department, Viet Tiep Hospital, Hai Phong, Vietnam
- Department of Infectious Diseases, Hai Phong University of Medicine and Pharmacy, Hai Phong, Vietnam
| | | | - Hoai T T Nguyen
- Training and Direction of Healthcare Activity Center, Kien An Hospital, Hai Phong, Vietnam
| | - Thu T M Pham
- Faculty of Public Health, Hai Phong University of Medicine and Pharmacy, Hai Phong, Vietnam
- School of Public Health, College of Public Health, Taipei Medical University, Taipei, Taiwan
| | - Thuy T Le
- President Office, Da Nang University of Medical Technology and Pharmacy, Da Nang, Vietnam
- Faculty of Medical Laboratory Science, Da Nang University of Medical Technology and Pharmacy, Da Nang, Vietnam
| | - Thao T P Nguyen
- Institute for Community Health Research, University of Medicine and Pharmacy, Hue University, Hue, Vietnam
| | - Cuong Q Tran
- Faculty of Public Health, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam
| | - Ha-Linh Quach
- Centre for Ageing Research & Education, Duke-NUS Medical School, National University of Singapore, Singapore, Singapore
| | - Kien T Nguyen
- Department of Health Promotion, Faculty of Social and Behavioral Sciences, Hanoi University of Public Health, Ha Noi, Vietnam
| | - Tuyen Van Duong
- School of Nutrition and Health Sciences, Taipei Medical University, Taipei, Taiwan
- International Master/Ph.D. Program in Medicine, Taipei Medical University, Taipei, Taiwan
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Bui TD, Tran DK, Vu VH, Tran H, Le MK, Truong QB, Thanh Hiep N, Minh Duc N. Beneficial effects of pulmonary embolism response team establishment in patients with pulmonary embolism in a developing country: a single-center experience. Clin Ter 2023; 174:518-524. [PMID: 38048115 DOI: 10.7417/ct.2023.5019] [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: 12/05/2023]
Abstract
Objective The impact of establishing a pulmonary embolism response team (PERT) in patients with pulmonary embolism (PE) has been proven in many developed countries. However, the efficacy of a PERT largely depends on expertise and infrastructure. This study explored the benefit of establishing a PERT in developing countries with limited healthcare resources by comparing the outcomes of patients with acute PE before and after PERT establishment at University Medical Center Ho Chi Minh City in Vietnam. Methods We conducted a single-center observational study from January 1, 2019, to August 1, 2021. All patients with PE confirmed on computed tomography were included. Patients admitted before PERT establishment were treated by cardiologists alone, while those hospitalized after PERT establishment were managed by the PERT. Results A total of 130 patients were included (pre-PERT estab-lishment: 51 patients; post-PERT establishment: 79 patients). The demographic characteristics, severity of PE, and clinical and laboratory findings were similar between the two groups. The post-PERT establishment group had a lower incidence rate of major and clinically relevant nonmajor bleeding (11.3% vs. 31.4%, p = 0.005) and required more interventional therapies (16.5% vs. 3.9%, p = 0.046) than did the pre-PERT establishment group. The in-hospital mortality rate decreased in the post-PERT establishment group compared with that in the pre-PERT establishment group (8.9% vs. 21.6%, p = 0.041). Conclusions Involvement of the PERT in PE management was associated with improved outcomes of patients with PE, including reduced bleeding and mortality rates in a resource-constrained hospital.
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Affiliation(s)
- T D Bui
- Cardiovascular Center, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - D K Tran
- Cardiovascular Center, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - V H Vu
- Cardiovascular Center, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam
- Department of Internal Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - H Tran
- Department of Internal Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
- Cardiovascular Center, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - M K Le
- Cardiovascular Center, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam
- Department of Critical Care Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Q B Truong
- Cardiovascular Center, University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam
- Department of Internal Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - N Thanh Hiep
- Department of Family Medicine, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam
| | - N Minh Duc
- Department of Radiology, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam
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Su Z, Vu VH, Leckband DE, Wu Y. A computational study for understanding the impact of p120-catenin on the cis-dimerization of cadherin. J Mol Cell Biol 2023:mjad055. [PMID: 37757467 DOI: 10.1093/jmcb/mjad055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2023] Open
Abstract
A prototype of cross-membrane signal transduction is that extracellular binding of cell surface receptors to their ligands induces intracellular signaling cascades. However, much less is known about the process in the opposite direction, called inside-out signaling. Recent studies show that it plays a more important role in regulating the functions of many cell surface receptors than we used to think. In particular, in cadherin-mediated cell adhesion, recent experiments indicate that intracellular binding of the scaffold protein p120-catenin can promote extracellular clustering of cadherin and alter its adhesive function. The underlying mechanism, however, is not well understood. To explore possible mechanisms, we designed a new multiscale simulation procedure. Using all-atom molecular dynamics simulations, we found that the conformational dynamics of the cadherin extracellular region can be altered by the intracellular binding of p120-catenin. More intriguingly, by integrating all-atom simulation results into coarse-grained random sampling, we showed that the altered conformational dynamics of cadherin caused by the binding of p120-catenin can increase the probability of lateral interactions between cadherins on the cell surface. These results suggest that p120-catenin could allosterically regulate the cis-dimerization of cadherin through two mechanisms. First, p120-catenin controls the extracellular conformational dynamics of cadherin. Second, p120-catenin oligomerization can further promote cadherin clustering. Our study, therefore, suggests a mechanistic foundation for the inside-out signaling in cadherin-mediated cell adhesion, while the computational framework can be generally applied to other cross-membrane signal transduction systems.
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Affiliation(s)
- Zhaoqian Su
- Department of Systems and Computational Biology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, United States
| | - Vinh H Vu
- Department of Biochemistry and University of Illinois, Urbana-Champaign, Urbana, IL 61801, United States
| | - Deborah E Leckband
- Department of Biochemistry and University of Illinois, Urbana-Champaign, Urbana, IL 61801, United States
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana-Champaign, Urbana, IL 61801, United States
| | - Yinghao Wu
- Department of Systems and Computational Biology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, United States
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Leckband DE, Vu VH, Zou Y, Sullivan BG. Mechanical activation of epidermal growth factor receptor at intercellular adhesions. Biophys J 2023; 122:90a. [PMID: 36785082 DOI: 10.1016/j.bpj.2022.11.688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Affiliation(s)
- Deborah E Leckband
- Department of Chemistry, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Vinh H Vu
- University of Illinois Urbana-Champaign, Urbana IL, USA
| | - Yubo Zou
- Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Brendan G Sullivan
- Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, IL, USA
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Abstract
Cadherin transmembrane proteins are responsible for intercellular adhesion in all biological tissues and modulate tissue morphogenesis, cell motility, force transduction, and macromolecular transport. The protein-mediated adhesions consist of adhesive trans interactions and lateral cis interactions. Although theory suggests cooperativity between cis and trans bonds, direct experimental evidence of such cooperativity has not been demonstrated. Here, the use of superresolution microscopy, in conjunction with intermolecular single-molecule Förster resonance energy transfer, demonstrated the mutual cooperativity of cis and trans interactions. Results further demonstrate the consequent assembly of large intermembrane junctions, using a biomimetic lipid bilayer cell adhesion model. Notably, the presence of cis interactions resulted in a nearly 30-fold increase in trans-binding lifetimes between epithelial-cadherin extracellular domains. In turn, the presence of trans interactions increased the lifetime of cis bonds. Importantly, comparison of trans-binding lifetimes of small and large cadherin clusters suggests that this cooperativity is primarily due to allostery. The direct quantitative demonstration of strong mutual cooperativity between cis and trans interactions at intermembrane adhesions provides insights into the long-standing controversy of how weak cis and trans interactions act in concert to create strong macroscopic cell adhesions.
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Affiliation(s)
- Connor J Thompson
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309
| | - Vinh H Vu
- Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, IL 61801
| | - Deborah E Leckband
- Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, IL 61801
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801
| | - Daniel K Schwartz
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309;
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Vu VH, Donovan SM, Brink LR, Li Q, Gross G, Dilger RN, Fleming SA. Developing a Reference Database for Typical Body and Organ Growth of the Artificially Reared Pig as a Biomedical Research Model. Front Pediatr 2021; 9:746471. [PMID: 34926340 PMCID: PMC8672453 DOI: 10.3389/fped.2021.746471] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 10/26/2021] [Indexed: 02/03/2023] Open
Abstract
Objectives: The pig is a common model utilized to support substantiation of novel bioactive components in infant formula. However, reference ranges for outcomes to determine safety are unclear. Our objective was to use historical data to objectively define typical body and organ growth metrics of the domesticated pig in research. Methods: Twenty-two studies were compiled to assess typical growth of body and organ weights in young pigs. Metadata were organized to include milk replacer sources, bioactive components, sex, breed, source of herd, feeding regimen, and rearing environment. A combination of statistical models including simple linear regression and linear mixed effect models were used to assess typical growth patterns. Results: Over 18,000 data points from 786 animals were available. In general, minimal differences in the growth of pigs who were male and female, artificially- or sow-reared, or fed ad libitum- or by scheduled-feeding, were observed in the first 30 days of life (P > 0.05). A weight-for-age chart from reference pigs was developed to compare body weights of pigs demonstrating growth characterized as accelerated, typical, reduced, and failure to thrive to illustrate effects of dietary interventions. Distributions of relative brain, liver, and intestine weights (as % of total body weight) were similar between rearing environments and sexes. An alternative bivariate level approach was utilized for the analysis of organ weights. This approach revealed significant biologically-relevant insights into how deficient diets can affect organ weight that a univariate level assessment of weight distribution was unable to detect. Conclusions: Ultimately, these data can be used to better interpret whether bioactive ingredients tested in the pig model affect growth and development within typical reference values for pigs in the first 30 days of life.
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Affiliation(s)
- Vinh H Vu
- Traverse Science, Champaign, IL, United States
| | - Sharon M Donovan
- Division of Nutritional Sciences, University of Illinois, Urbana, IL, United States.,Department of Food Science and Human Nutrition, University of Illinois, Urbana, IL, United States
| | - Lauren R Brink
- Medical and Scientific Affairs, Reckitt
- Mead Johnson Nutrition Institute, Evansville, IN, United States
| | - Qian Li
- Medical and Scientific Affairs, Reckitt
- Mead Johnson Nutrition Institute, Evansville, IN, United States
| | - Gabriele Gross
- Medical and Scientific Affairs, Reckitt
- Mead Johnson Nutrition Institute, Nijmegen, Netherlands
| | - Ryan N Dilger
- Traverse Science, Champaign, IL, United States.,Division of Nutritional Sciences, University of Illinois, Urbana, IL, United States.,Piglet Nutrition and Cognition Laboratory, Department of Animal Sciences, University of Illinois, Urbana, IL, United States
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Thompson CJ, Su Z, Vu VH, Wu Y, Leckband DE, Schwartz DK. Cadherin clusters stabilized by a combination of specific and nonspecific cis-interactions. eLife 2020; 9:e59035. [PMID: 32876051 PMCID: PMC7505656 DOI: 10.7554/elife.59035] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [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: 05/18/2020] [Accepted: 09/01/2020] [Indexed: 12/13/2022] Open
Abstract
We demonstrate a combined experimental and computational approach for the quantitative characterization of lateral interactions between membrane-associated proteins. In particular, weak, lateral (cis) interactions between E-cadherin extracellular domains tethered to supported lipid bilayers, were studied using a combination of dynamic single-molecule Förster Resonance Energy Transfer (FRET) and kinetic Monte Carlo (kMC) simulations. Cadherins are intercellular adhesion proteins that assemble into clusters at cell-cell contacts through cis- and trans- (adhesive) interactions. A detailed and quantitative understanding of cis-clustering has been hindered by a lack of experimental approaches capable of detecting and quantifying lateral interactions between proteins on membranes. Here single-molecule intermolecular FRET measurements of wild-type E-cadherin and cis-interaction mutants combined with simulations demonstrate that both nonspecific and specific cis-interactions contribute to lateral clustering on lipid bilayers. Moreover, the intermolecular binding and dissociation rate constants are quantitatively and independently determined, demonstrating an approach that is generalizable for other interacting proteins.
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Affiliation(s)
- Connor J Thompson
- Department of Chemical and Biological Engineering, University of Colorado BoulderBoulderUnited States
| | - Zhaoqian Su
- Department of Systems and Computational Biology, Albert Einstein College of MedicineBronxUnited States
| | - Vinh H Vu
- Department of Biochemistry and University of Illinois, Urbana-ChampaignUrbanaUnited States
| | - Yinghao Wu
- Department of Systems and Computational Biology, Albert Einstein College of MedicineBronxUnited States
| | - Deborah E Leckband
- Department of Biochemistry and University of Illinois, Urbana-ChampaignUrbanaUnited States
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana-ChampaignUrbanaUnited States
| | - Daniel K Schwartz
- Department of Chemical and Biological Engineering, University of Colorado BoulderBoulderUnited States
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Thompson C, Vu VH, Leckband DE, Schwartz DK. Cadherin Extracellular Domain Clustering in the Absence of Trans-Interactions. Biophys J 2020. [DOI: 10.1016/j.bpj.2019.11.477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Abstract
While both cis and trans (adhesive)-interactions cooperate in the assembly of intercellular adhesions, computational simulations have predicted that two-dimensional confinement may promote cis-oligomerization, in the absence of trans-interactions. Here, single-molecule tracking of cadherin extracellular domains on supported lipid bilayers revealed the density-dependent formation of oligomers and cis-clusters in the absence of trans-interactions. Lateral oligomers were virtually eliminated by mutating a putative cis (lateral) binding interface. At low cadherin surface coverage, wild-type and mutant cadherin diffused rapidly, consistent with the motion of a lipid molecule within a cadherin-free supported bilayer and with cadherins diffusing as monomers. Although the diffusion of mutant cadherin did not change appreciably with increasing surface coverage, the average short-time diffusion coefficient of wild-type cadherin slowed significantly above a fractional surface coverage of ∼0.01 (∼1100 molecules/μm2). A detailed analysis of molecular trajectories suggested the presence of a broad size distribution of cis-cadherin oligomers. These findings verify predictions that two-dimensional confinement promotes cis-oligomerization, in the absence of trans-interactions.
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Affiliation(s)
- Connor J. Thompson
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder 80309, Colorado, United States
| | - Vinh H. Vu
- Department of Biochemistry, University of Illinois, Urbana–Champaign, Urbana 61801, Illinois, United States
| | - Deborah E. Leckband
- Department of Biochemistry, University of Illinois, Urbana–Champaign, Urbana 61801, Illinois, United States
- Department of Chemical and Biomolecular Engineering, University of Illinois, Urbana–Champaign, Urbana 61801, Illinois, United States
| | - Daniel K. Schwartz
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder 80309, Colorado, United States
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Juettner VV, Kruse K, Dan A, Vu VH, Khan Y, Le J, Leckband D, Komarova Y, Malik AB. VE-PTP stabilizes VE-cadherin junctions and the endothelial barrier via a phosphatase-independent mechanism. J Cell Biol 2019; 218:1725-1742. [PMID: 30948425 PMCID: PMC6504901 DOI: 10.1083/jcb.201807210] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 12/20/2018] [Accepted: 03/12/2019] [Indexed: 12/16/2022] Open
Abstract
Juettner et al. describe a novel phosphatase-activity–independent mechanism by which the phosphatase VE-PTP restricts endothelial permeability. VE-PTP functions as a scaffold that binds and inhibits the RhoGEF GEF-H1, limiting RhoA-dependent tension across VE-cadherin junctions and decreasing VE-cadherin internalization to stabilize adherens junctions and reduce endothelial permeability. Vascular endothelial (VE) protein tyrosine phosphatase (PTP) is an endothelial-specific phosphatase that stabilizes VE-cadherin junctions. Although studies have focused on the role of VE-PTP in dephosphorylating VE-cadherin in the activated endothelium, little is known of VE-PTP’s role in the quiescent endothelial monolayer. Here, we used the photoconvertible fluorescent protein VE-cadherin-Dendra2 to monitor VE-cadherin dynamics at adherens junctions (AJs) in confluent endothelial monolayers. We discovered that VE-PTP stabilizes VE-cadherin junctions by reducing the rate of VE-cadherin internalization independently of its phosphatase activity. VE-PTP serves as an adaptor protein that through binding and inhibiting the RhoGEF GEF-H1 modulates RhoA activity and tension across VE-cadherin junctions. Overexpression of the VE-PTP cytosolic domain mutant interacting with GEF-H1 in VE-PTP–depleted endothelial cells reduced GEF-H1 activity and restored VE-cadherin dynamics at AJs. Thus, VE-PTP stabilizes VE-cadherin junctions and restricts endothelial permeability by inhibiting GEF-H1, thereby limiting RhoA signaling at AJs and reducing the VE-cadherin internalization rate.
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Affiliation(s)
- Vanessa V Juettner
- Department of Pharmacology and the Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL
| | - Kevin Kruse
- Department of Pharmacology and the Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL
| | - Arkaprava Dan
- Department of Chemical and Biomolecular Engineering, University of Illinois College of Engineering at Urbana-Champaign, Urbana, IL
| | - Vinh H Vu
- Department of Chemical and Biomolecular Engineering, University of Illinois College of Engineering at Urbana-Champaign, Urbana, IL
| | - Yousaf Khan
- Department of Pharmacology and the Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL
| | - Jonathan Le
- Department of Pharmacology and the Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL
| | - Deborah Leckband
- Department of Chemical and Biomolecular Engineering, University of Illinois College of Engineering at Urbana-Champaign, Urbana, IL
| | - Yulia Komarova
- Department of Pharmacology and the Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL
| | - Asrar B Malik
- Department of Pharmacology and the Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL
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