LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 64

Search options

  1. Article ; Online: Teletherapy, AAC & COVID-19: the experiences of speech language pathologists providing teletherapy during a global pandemic.

    Nader, Danielle T / Erickson, Karen A

    Augmentative and alternative communication (Baltimore, Md. : 1985)

    2023  Volume 39, Issue 3, Page(s) 146–156

    Abstract: The COVID-19 pandemic required many speech-language pathologists (SLPs) to transition to teletherapy service delivery. This study was designed to explore the experiences and perceptions of SLPs who made this transition with children with disabilities who ...

    Abstract The COVID-19 pandemic required many speech-language pathologists (SLPs) to transition to teletherapy service delivery. This study was designed to explore the experiences and perceptions of SLPs who made this transition with children with disabilities who used aided augmentative and alternative communication (AAC). Semi-structured interviews were conducted virtually with 10 SLPs who provided regular teletherapy services to children who used AAC during but not before the pandemic. Interview transcripts were analyzed thematically using immersion, reduction, and constant comparison to understand SLP experiences and perceptions individually and across the group. Results reveal that despite the challenges faced transitioning to teletherapy, there were benefits. Furthermore, many of the participating SLPs developed successful strategies and solutions for the challenges they faced. Participants in this study highlighted the unique and important role that caregivers and parents played in the success of the teletherapy they provided. This study suggests that SLPs, caregivers, and children demonstrated resilience in the face of a large-scale, unforeseen change. SLPs consistently reported the ability to maintain continuity of care during a stressful transition period, while meeting the unique needs of the children who used AAC they served.
    MeSH term(s) Child ; Humans ; Communication Disorders ; Pandemics ; Pathologists ; Speech ; Speech-Language Pathology ; Communication Aids for Disabled ; COVID-19
    Language English
    Publishing date 2023-01-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 2068579-8
    ISSN 1477-3848 ; 0743-4618
    ISSN (online) 1477-3848
    ISSN 0743-4618
    DOI 10.1080/07434618.2022.2159871
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Molecular Cross-Talk between Integrins and Cadherins Leads to a Loss of Vascular Barrier Integrity during SARS-CoV-2 Infection.

    Nader, Danielle / Kerrigan, Steve W

    Viruses

    2022  Volume 14, Issue 5

    Abstract: The vascular barrier is heavily injured following SARS-CoV-2 infection and contributes enormously to life-threatening complications in COVID-19. This endothelial dysfunction is associated with the phlogistic phenomenon of cytokine storms, thrombotic ... ...

    Abstract The vascular barrier is heavily injured following SARS-CoV-2 infection and contributes enormously to life-threatening complications in COVID-19. This endothelial dysfunction is associated with the phlogistic phenomenon of cytokine storms, thrombotic complications, abnormal coagulation, hypoxemia, and multiple organ failure. The mechanisms surrounding COVID-19 associated endotheliitis have been widely attributed to ACE2-mediated pathways. However, integrins are emerging as possible receptor candidates for SARS-CoV-2, and their complex intracellular signaling events are essential for maintaining endothelial homeostasis. Here, we showed that the spike protein of SARS-CoV-2 depends on its RGD motif to drive barrier dysregulation by hijacking integrin αVβ3, expressed on human endothelial cells. This triggers the redistribution and internalization of major junction protein VE-Cadherin which leads to the barrier disruption phenotype. Both extracellular and intracellular inhibitors of integrin αVβ3 prevented these effects, similarly to the RGD-cyclic peptide compound Cilengitide, which suggests that the spike protein-through its RGD motif-binds to αVβ3 and elicits vascular leakage events. These findings support integrins as an additional receptor for SARS-CoV-2, particularly as integrin engagement can elucidate many of the adverse endothelial dysfunction events that stem from COVID-19.
    MeSH term(s) COVID-19 ; Cadherins ; Endothelial Cells/metabolism ; Humans ; Integrin alphaVbeta3 ; SARS-CoV-2 ; Spike Glycoprotein, Coronavirus/metabolism
    Chemical Substances Cadherins ; Integrin alphaVbeta3 ; Spike Glycoprotein, Coronavirus ; spike protein, SARS-CoV-2
    Language English
    Publishing date 2022-04-25
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2516098-9
    ISSN 1999-4915 ; 1999-4915
    ISSN (online) 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v14050891
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Vascular dysregulation following SARS-CoV-2 infection involves integrin signaling through a VE-Cadherin mediated pathway

    Nader, Danielle / Kerrigan, Steve

    bioRxiv

    Abstract: The vascular barrier is heavily injured following SARS-CoV-2 infection and contributes enormously to life-threatening complications in COVID-19. This endothelial dysfunction is associated with the phlogistic phenomenon of cytokine storms, thrombotic ... ...

    Abstract The vascular barrier is heavily injured following SARS-CoV-2 infection and contributes enormously to life-threatening complications in COVID-19. This endothelial dysfunction is associated with the phlogistic phenomenon of cytokine storms, thrombotic complications, abnormal coagulation, hypoxemia, and multiple organ failure. The mechanisms surrounding COVID-19 associated endotheliitis have been widely attributed to ACE2-mediated pathways. However, integrins have emerged as possible receptor candidates for SARS-CoV-2, and their complex intracellular signaling events are essential for maintaining endothelial homeostasis. Here, we showed that the spike protein of SARS-CoV-2 depends on its RGD motif to drive barrier dysregulation through hijacking integrin αVβ3. This triggers the redistribution and internalization of major junction protein VE-Cadherin which leads to the barrier disruption phenotype. Both extracellular and intracellular inhibitors of integrin αVβ3 prevented these effects, similarly to the RGD-cyclic peptide compound Cilengitide, which suggests that the spike protein – through its RGD motif – binds to αVβ3 and elicits vascular leakage events. These findings support integrins as an additional receptor for SARS-CoV-2, particularly as integrin engagement can elucidate many of the adverse endothelial dysfunction events that stem from COVID-19.
    Keywords covid19
    Language English
    Publishing date 2022-03-15
    Publisher Cold Spring Harbor Laboratory
    Document type Article ; Online
    DOI 10.1101/2022.03.15.484274
    Database COVID19

    Kategorien

  4. Article ; Online: Age-dependent effect of insulin in the regulation of intracellular calcium in ventricular cardiomyocytes.

    Bkaily, Ghassan / Al-Shahrani, Maram Ali / Nader, Moni / Jacques, Danielle

    Canadian journal of physiology and pharmacology

    2022  Volume 100, Issue 12, Page(s) 1106–1114

    Abstract: In this study, we wanted to verify whether the effect of insulin on calcium homeostasis depends on the heart's development stage. Using a quantitative 3D confocal microscopy, we tested the effect of a high insulin concentration (100 µU) in freshly ... ...

    Abstract In this study, we wanted to verify whether the effect of insulin on calcium homeostasis depends on the heart's development stage. Using a quantitative 3D confocal microscopy, we tested the effect of a high insulin concentration (100 µU) in freshly cultured ventricular cardiomyocytes from newborn and adult rats. Our results showed that the cytosolic basal level of calcium was higher in newborn cardiomyocytes with no change in the nuclear basal calcium level compared with the adult cardiomyocytes; in addition, insulin induced a slow increase of cytosolic and nuclear calcium in newborn ventricular cardiomyocytes, followed by two phases. However, the first phase of slow cytosolic and nuclear calcium increase was absent in adult rat ventricular cardiomyocytes. Furthermore, the time to the onset of increase of cytosolic and nuclear calcium was longer in newborn cardiomyocytes compared with adults. Moreover, the time to peak of the calcium transient was shorter in newborns than in adult cardiomyocytes. These results demonstrate that insulin differently regulates calcium homeostasis in newborns than in adult cardiomyocytes. Thus, newborn rat cardiomyocytes, commonly used in research as a model for adult cardiomyocytes, should be used with caution when dealing with insulin in normal and disease conditions.
    MeSH term(s) Rats ; Animals ; Myocytes, Cardiac ; Calcium/pharmacology ; Insulin/pharmacology ; Cells, Cultured ; Heart Ventricles
    Chemical Substances Calcium (SY7Q814VUP) ; Insulin
    Language English
    Publishing date 2022-10-12
    Publishing country Canada
    Document type Journal Article
    ZDB-ID 127527-6
    ISSN 1205-7541 ; 0008-4212
    ISSN (online) 1205-7541
    ISSN 0008-4212
    DOI 10.1139/cjpp-2022-0328
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Integrins as Therapeutic Targets for SARS-CoV-2.

    Gressett, Timothy E / Nader, Danielle / Robles, Juan Pablo / Buranda, Tione / Kerrigan, Steven W / Bix, Gregory

    Frontiers in cellular and infection microbiology

    2022  Volume 12, Page(s) 892323

    MeSH term(s) Angiotensin-Converting Enzyme 2 ; Antiviral Agents ; Humans ; Integrins ; SARS-CoV-2 ; COVID-19 Drug Treatment
    Chemical Substances Antiviral Agents ; Integrins ; Angiotensin-Converting Enzyme 2 (EC 3.4.17.23)
    Language English
    Publishing date 2022-04-29
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2619676-1
    ISSN 2235-2988 ; 2235-2988
    ISSN (online) 2235-2988
    ISSN 2235-2988
    DOI 10.3389/fcimb.2022.892323
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: Targeting Internalized

    Nader, Danielle / Yousef, Fajer / Kavanagh, Nicola / Ryan, Benedict K / Kerrigan, Steven W

    Antibiotics (Basel, Switzerland)

    2021  Volume 10, Issue 5

    Abstract: The bacterial ... ...

    Abstract The bacterial pathogen
    Language English
    Publishing date 2021-05-14
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2681345-2
    ISSN 2079-6382
    ISSN 2079-6382
    DOI 10.3390/antibiotics10050581
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article: "Bariatric Beriberi": A Rare Case of Wernicke Encephalopathy Two Weeks After Laparoscopic Sleeve Gastrectomy.

    Bathobakae, Lefika / Ozgur, Sacide S / Lombardo, Danielle / Mekheal, Nader / Michael, Patrick

    Cureus

    2023  Volume 15, Issue 4, Page(s) e37056

    Abstract: Wernicke encephalopathy (WE) is an acute neurological syndrome caused by thiamine (vitamin B1) deficiency. This disorder manifests as a triad of gait ataxia, confusion, and vision abnormalities. The absence of a full triad does not rule out WE. Because ... ...

    Abstract Wernicke encephalopathy (WE) is an acute neurological syndrome caused by thiamine (vitamin B1) deficiency. This disorder manifests as a triad of gait ataxia, confusion, and vision abnormalities. The absence of a full triad does not rule out WE. Because of its vague presentation, WE is commonly missed in patients with no history of alcohol abuse. Other risk factors for WE include bariatric surgery, hemodialysis, hyperemesis gravidarum, and malabsorption syndromes. WE is a clinical diagnosis that can be confirmed with an MRI of the brain as hyperintensities in the mammillary bodies, periaqueductal area, thalami, and hippocampus. If suspected in a patient, WE must be immediately treated with intravenous thiamine to prevent evolution into Korsakoff syndrome, coma, or death. Currently, there is no consensus in the medical community as to how much thiamine must be given and for how long. Therefore, there is a need for more research in the diagnosis and management of WE after bariatric surgery. Herein, we report a rare case of a 23-year-old female with a history of morbid obesity who developed WE two weeks after a laparoscopic sleeve gastrectomy.
    Language English
    Publishing date 2023-04-03
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.37056
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: A new perspective in sepsis treatment: could RGD-dependent integrins be novel targets?

    Nader, Danielle / Curley, Gerard F / Kerrigan, Steven W

    Drug discovery today

    2020  Volume 25, Issue 12, Page(s) 2317–2325

    Abstract: Sepsis is a life-threatening condition caused by the response of the body to an infection, and has recently been regarded as a global health priority because of the lack of effective treatments available. Vascular endothelial cells have a crucial role in ...

    Abstract Sepsis is a life-threatening condition caused by the response of the body to an infection, and has recently been regarded as a global health priority because of the lack of effective treatments available. Vascular endothelial cells have a crucial role in sepsis and are believed to be a major target of pathogens during the early stages of infection. Accumulating evidence suggests that common sepsis pathogens, including bacteria, fungi, and viruses, all contain a critical integrin recognition motif, Arg-Gly-Asp (RGD), in their major cell wall-exposed proteins that might act as ligands to crosslink to vascular endothelial cells, triggering systemic dysregulation resulting in sepsis. In this review, we discuss the potential of anti-integrin therapy in the treatment of sepsis and septic shock.
    MeSH term(s) Bacterial Infections/drug therapy ; Humans ; Integrins/antagonists & inhibitors ; Mycoses/drug therapy ; Oligopeptides/antagonists & inhibitors ; Sepsis/drug therapy ; Virus Diseases/drug therapy
    Chemical Substances Integrins ; Oligopeptides ; arginyl-glycyl-aspartic acid (78VO7F77PN)
    Keywords covid19
    Language English
    Publishing date 2020-10-06
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1324988-5
    ISSN 1878-5832 ; 1359-6446
    ISSN (online) 1878-5832
    ISSN 1359-6446
    DOI 10.1016/j.drudis.2020.09.038
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: SARS-CoV-2 uses major endothelial integrin αvβ3 to cause vascular dysregulation in-vitro during COVID-19.

    Nader, Danielle / Fletcher, Nicola / Curley, Gerard F / Kerrigan, Steven W

    PloS one

    2021  Volume 16, Issue 6, Page(s) e0253347

    Abstract: The unprecedented global COVID-19 pandemic has prompted a desperate international effort to accelerate the development of anti-viral candidates. For unknown reasons, COVID-19 infections are associated with adverse cardiovascular complications, ... ...

    Abstract The unprecedented global COVID-19 pandemic has prompted a desperate international effort to accelerate the development of anti-viral candidates. For unknown reasons, COVID-19 infections are associated with adverse cardiovascular complications, implicating that vascular endothelial cells are essential in viral propagation. The etiological pathogen, SARS-CoV-2, has a higher reproductive number and infection rate than its predecessors, indicating it possesses novel characteristics that infers enhanced transmissibility. A unique K403R spike protein substitution encodes an Arg-Gly-Asp (RGD) motif, introducing a potential role for RGD-binding host integrins. Integrin αVβ3 is widely expressed across the host, particularly in the endothelium, which acts as the final barrier before microbial entry into the bloodstream. This mutagenesis creates an additional binding site, which may be sufficient to increase SARS-CoV-2 pathogenicity. Here, we investigate how SARS-CoV-2 passes from the epithelium to endothelium, the effects of αVβ3 antagonist, Cilengitide, on viral adhesion, vasculature permeability and leakage, and also report on a simulated interaction between the viral and host protein in-silico.
    MeSH term(s) Antigens, CD/metabolism ; Binding Sites ; COVID-19/metabolism ; COVID-19/physiopathology ; Caco-2 Cells ; Cadherins/metabolism ; Computer Simulation ; Endothelium, Vascular/cytology ; Endothelium, Vascular/physiopathology ; Endothelium, Vascular/virology ; Host-Pathogen Interactions/drug effects ; Humans ; Integrin alphaVbeta3/chemistry ; Integrin alphaVbeta3/metabolism ; Models, Molecular ; Mutation ; Permeability ; SARS-CoV-2/drug effects ; SARS-CoV-2/genetics ; SARS-CoV-2/metabolism ; SARS-CoV-2/pathogenicity ; Snake Venoms/pharmacology ; Spike Glycoprotein, Coronavirus/chemistry ; Spike Glycoprotein, Coronavirus/metabolism ; Virus Internalization
    Chemical Substances Antigens, CD ; Cadherins ; Integrin alphaVbeta3 ; Snake Venoms ; Spike Glycoprotein, Coronavirus ; cadherin 5 ; Cilengitide (4EDF46E4GI)
    Language English
    Publishing date 2021-06-23
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0253347
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Robotic-assisted spine surgery allows for increased pedicle screw sizes while still improving safety as indicated by elevated triggered electromyographic thresholds.

    Kanaly, Charles W / Backes, Danielle M / Toossi, Nader / Bucklen, Brandon

    Journal of robotic surgery

    2022  Volume 17, Issue 3, Page(s) 1007–1012

    Abstract: The present study used triggered electromyographic (EMG) testing as a tool to determine the safety of pedicle screw placement. In this Institutional Review Board exempt review, data from 151 consecutive patients (100 robotic; 51 non-robotic) who had ... ...

    Abstract The present study used triggered electromyographic (EMG) testing as a tool to determine the safety of pedicle screw placement. In this Institutional Review Board exempt review, data from 151 consecutive patients (100 robotic; 51 non-robotic) who had undergone instrumented spinal fusion surgery of the thoracic, lumbar, or sacral regions were analyzed. The sizes of implanted pedicle screws and EMG threshold data were compared between screws that were placed immediately before and after adoption of the robotic technique. The robotic group had significantly larger screws inserted that were wider (7 ± 0.7 vs 6.5 ± 0.3 mm; p < 0.001) and longer (47.8 ± 6.4 vs 45.7 ± 4.3 mm; p < 0.001). The robotic group also had significantly higher stimulation thresholds (34.0 ± 11.9 vs 30.2 ± 9.8 mA; p = 0.002) of the inserted screws. The robotic group stayed in the hospital postoperatively for fewer days (2.3 ± 1.2 vs 2.9 ± 2 days; p = 0.04), but had longer surgery times (174 ± 37.8 vs 146 ± 41.5 min; p < 0.001). This study demonstrated that the use of navigated, robot-assisted surgery allowed for placement of larger pedicle screws without compromising safety, as determined by pedicle screw stimulation thresholds. Future studies should investigate whether these effects become even stronger in a later cohort after surgeons have more experience with the robotic technique. It should also be evaluated whether the larger screw sizes allowed by the robotic technology actually translate into improved long-term clinical outcomes.
    MeSH term(s) Humans ; Pedicle Screws ; Robotic Surgical Procedures/methods ; Spinal Fusion/methods ; Spine/surgery ; Robotics ; Lumbar Vertebrae/surgery ; Retrospective Studies
    Language English
    Publishing date 2022-11-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2268283-1
    ISSN 1863-2491 ; 1863-2483
    ISSN (online) 1863-2491
    ISSN 1863-2483
    DOI 10.1007/s11701-022-01493-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top