LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 31

Search options

  1. Book ; Thesis: The chicken embryo chorioallantoic membrane assay

    Qu, Baoxi

    a method for screening angiotoxic effects of chemicals

    1991  

    Author's details vorgelegt von Baoxi Qu
    Size IV, 46 Bl. : Ill.
    Publishing country Switzerland
    Document type Book ; Thesis
    Thesis / German Habilitation thesis Zürich, Univ., Diss., 1991
    HBZ-ID HT004288001
    Database Catalogue ZB MED Medicine, Health

    Kategorien

  2. Article: Poor Sleep Quality is Linked to Elevated Extracellular Vesicle-Associated Inflammatory Cytokines in Warfighters With Chronic Mild Traumatic Brain Injuries.

    Gottshall, Jackie L / Guedes, Vivian A / Pucci, Josephine U / Brooks, Daniel / Watson, Nora / Sheth, Phorum / Gabriel, Ainslee / Mithani, Sara / Leete, Jacqueline J / Lai, Chen / Qu, Bao-Xi / Devoto, Christina / Gill, Jessica M / Kenney, Kimbra / Werner, J Kent

    Frontiers in pharmacology

    2022  Volume 12, Page(s) 762077

    Abstract: Background: ...

    Abstract Background:
    Language English
    Publishing date 2022-01-27
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587355-6
    ISSN 1663-9812
    ISSN 1663-9812
    DOI 10.3389/fphar.2021.762077
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Remote blast-related mild traumatic brain injury is associated with differential expression of exosomal microRNAs identified in neurodegenerative and immunological processes.

    Devoto, Christina / Guedes, Vivian A / Lai, Chen / Leete, Jacqueline J / Mithani, Sara / Edwards, Katie / Vorn, Rany / Qu, Bao-Xi / Wilde, Elisabeth A / Walker, William C / Diaz-Arrastia, Ramon / Werner, J Kent / Kenney, Kimbra / Gill, Jessica M

    Brain injury

    2022  Volume 36, Issue 5, Page(s) 652–661

    Abstract: Background: Blast traumatic brain injury (TBI) and subconcussive blast exposure have been associated, pathologically, with chronic traumatic encephalopathy (CTE) and, clinically, with cognitive and affective symptoms, but the underlying pathomechanisms ... ...

    Abstract Background: Blast traumatic brain injury (TBI) and subconcussive blast exposure have been associated, pathologically, with chronic traumatic encephalopathy (CTE) and, clinically, with cognitive and affective symptoms, but the underlying pathomechanisms of these associations are not well understood. We hypothesized that exosomal microRNA (miRNA) expression, and their relation to neurobehavioral outcomes among Veterans with blunt or blast mild TBI (mTBI) may provide insight into possible mechanisms for these associations and therapeutic targets.
    Methods: This is a subanalysis of a larger Chronic Effects of Neurotrauma Consortium Biomarker Discovery Project. Participants (n = 152) were divided into three groups: Controls (n = 35); Blunt mTBI only (n = 54); and Blast/blast+blunt mTBI (n = 63). Postconcussive and post-traumatic stress symptoms were evaluated using the NSI and PCL-5, respectively. Exosomal levels of 798 miRNA expression were measured.
    Results: In the blast mTBI group, 23 differentially regulated miRNAs were observed compared to the blunt mTBI group and 23 compared to controls. From the pathway analysis, significantly dysregulated miRNAs in the blast exposure group correlated with inflammatory, neurodegenerative, and androgen receptor pathways.
    Discussion: Our findings suggest that chronic neurobehavioral symptoms after blast TBI may pathomechanistically relate to dysregulated cellular pathways involved with neurodegeneration, inflammation, and central hormonal regulation.
    MeSH term(s) Blast Injuries/complications ; Blast Injuries/genetics ; Blast Injuries/psychology ; Brain Concussion/complications ; Brain Injuries, Traumatic/complications ; Brain Injuries, Traumatic/genetics ; Explosions ; Humans ; MicroRNAs/genetics ; Stress Disorders, Post-Traumatic/complications ; Veterans/psychology
    Chemical Substances MicroRNAs
    Language English
    Publishing date 2022-03-24
    Publishing country England
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 639115-1
    ISSN 1362-301X ; 0269-9052
    ISSN (online) 1362-301X
    ISSN 0269-9052
    DOI 10.1080/02699052.2022.2042854
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Extracellular vesicle concentrations of glial fibrillary acidic protein and neurofilament light measured 1 year after traumatic brain injury.

    Flynn, Spencer / Leete, Jacqueline / Shahim, Pashtun / Pattinson, Cassandra / Guedes, Vivian A / Lai, Chen / Devoto, Christina / Qu, Bao-Xi / Greer, Kisha / Moore, Brian / van der Merwe, Andre / Ekanayake, Vindhya / Gill, Jessica / Chan, Leighton

    Scientific reports

    2021  Volume 11, Issue 1, Page(s) 3896

    Abstract: Traumatic brain injury (TBI) is linked to long-term symptoms in a sub-set of patients who sustain an injury, but this risk is not universal, leading us and others to question the nature of individual variability in recovery trajectories. Extracellular ... ...

    Abstract Traumatic brain injury (TBI) is linked to long-term symptoms in a sub-set of patients who sustain an injury, but this risk is not universal, leading us and others to question the nature of individual variability in recovery trajectories. Extracellular vesicles (EVs) are a promising, novel avenue to identify blood-based biomarkers for TBI. Here, our aim was to determine if glial fibrillary acidic protein (GFAP) and neurofilament light (NfL) measured 1-year postinjury in EVs could distinguish patients from controls, and whether these biomarkers relate to TBI severity or recovery outcomes. EV GFAP and EV NfL were measured using an ultrasensitive assay in 72 TBI patients and 20 controls. EV GFAP concentrations were elevated in moderate and severe TBI compared to controls (p's < 0.001) and could distinguish controls from moderate (AUC = 0.86) or severe TBI (AUC = 0.88). Increased EV GFAP and EV NfL levels were associated with lower 1-year Glasgow Outcome Scale-Extended (GOS-E) score (p's < 0.05). These findings suggest that blood-derived EV concentrations of GFAP and NfL drawn even 1 year after injury are higher in TBI patients compared to controls, and are related to injury severity and poor recovery outcomes, suggesting that TBIs alter the activity of these biomarkers, likely contributing to individual variability in recovery.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Biomarkers/metabolism ; Brain Injuries, Traumatic/metabolism ; Case-Control Studies ; Extracellular Vesicles/metabolism ; Female ; Glial Fibrillary Acidic Protein/metabolism ; Humans ; Male ; Middle Aged ; Neurofilament Proteins/metabolism ; Recovery of Function ; Young Adult
    Chemical Substances Biomarkers ; GFAP protein, human ; Glial Fibrillary Acidic Protein ; Neurofilament Proteins ; neurofilament protein L
    Language English
    Publishing date 2021-02-16
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Intramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-021-82875-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Heterozygous knockout of cytosolic phospholipase A

    Qu, Baoxi / Gong, Yunhua / Gill, Jassica M / Kenney, Kimbra / Diaz-Arrastia, Ramon

    Brain research

    2017  Volume 1670, Page(s) 248–252

    Abstract: Cytosolic phospholipase A2α (cPLA2α) is a key enzyme in regulation of inflammation process and neuromembrane homeostasis, both of which are critical in pathogenesis of Alzheimer's diseases. By hybride APP/PS1 Tg-AD mice with cPLA2α knockout mice, three ... ...

    Abstract Cytosolic phospholipase A2α (cPLA2α) is a key enzyme in regulation of inflammation process and neuromembrane homeostasis, both of which are critical in pathogenesis of Alzheimer's diseases. By hybride APP/PS1 Tg-AD mice with cPLA2α knockout mice, three lines of APP/PS1 Tg-AD mice were produced with genotypes of cPLA2α
    Language English
    Publishing date 2017-09-01
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1200-2
    ISSN 1872-6240 ; 0006-8993
    ISSN (online) 1872-6240
    ISSN 0006-8993
    DOI 10.1016/j.brainres.2017.06.021
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Candidate PET Radioligand Development for Neurofibrillary Tangles: Two Distinct Radioligand Binding Sites Identified in Postmortem Alzheimer's Disease Brain.

    Cai, Lisheng / Qu, Baoxi / Hurtle, Bryan T / Dadiboyena, Sureshbabu / Diaz-Arrastia, Ramon / Pike, Victor W

    ACS chemical neuroscience

    2016  Volume 7, Issue 7, Page(s) 897–911

    Abstract: 18)F]THK-523 and [(18)F]807 are promising radioligands for imaging neurofibrillary tangles (NFTs) with positron emission tomography (PET) in neurodegenerative diseases, such as Alzheimer's disease (AD) and traumatic brain injury. Although [(18)F]THK- ... ...

    Abstract [(18)F]THK-523 and [(18)F]807 are promising radioligands for imaging neurofibrillary tangles (NFTs) with positron emission tomography (PET) in neurodegenerative diseases, such as Alzheimer's disease (AD) and traumatic brain injury. Although [(18)F]THK-523 and [(18)F]T807 are considered high-affinity selective radioligands for NFTs, uncertainty has existed as to whether PET radioligands for imaging NFTs bind to the same molecular site because in vitro assays for ligands binding to NFTs have been lacking. We labeled THK-523 and T807 with tritium to serve as reference radioligands for in vitro binding assays with AD brain homogenates for newly synthesized ligands. With these radioligands, we identified two distinct binding sites for small molecules, one site with high affinity for THK-523 and the other with high affinity for T807. Moreover, binding assays with [(3)H]PIB confirmed that the two newly identified binding sites are also distinct from the thioflavin-T binding site where all current clinically useful PET radioligands for imaging β-amyloid plaque bind with high affinity. The two newly identified binding sites are considered to reside on NFTs rather than on β-amyloid plaques. Furthermore, we applied all three binding assays to a set of newly prepared compounds, based on chain modifications to THK-523. Some compounds with high affinity and selectivity for the THK-523 binding site emerged from this set, including one with amenability to labeling with fluorine-18, namely, ligand 10b.
    MeSH term(s) Alzheimer Disease/diagnostic imaging ; Alzheimer Disease/pathology ; Aniline Compounds/chemistry ; Aniline Compounds/pharmacokinetics ; Autoradiography ; Binding Sites/drug effects ; Brain/diagnostic imaging ; Brain/metabolism ; Carbolines/pharmacokinetics ; Diagnosis ; Dose-Response Relationship, Drug ; Female ; Humans ; Male ; Neurofibrillary Tangles/pathology ; Positron-Emission Tomography ; Quinolines/chemistry ; Quinolines/pharmacokinetics ; Radioligand Assay ; Radiopharmaceuticals/chemical synthesis ; Radiopharmaceuticals/pharmacokinetics ; Thiazoles/chemistry ; Thiazoles/pharmacokinetics ; tau Proteins/drug effects ; tau Proteins/metabolism
    Chemical Substances 2-(4'-(methylamino)phenyl)-6-hydroxybenzothiazole ; 2-(4-aminophenyl)-6-(2-fluoroethoxy)quinoline ; Aniline Compounds ; Carbolines ; Quinolines ; Radiopharmaceuticals ; Thiazoles ; tau Proteins ; 7-(6-fluoropyridin-3-yl)-5H-pyrido(4,3-b)indole (J09QS3Z3WB)
    Language English
    Publishing date 2016-05-19
    Publishing country United States
    Document type Journal Article
    ISSN 1948-7193
    ISSN (online) 1948-7193
    DOI 10.1021/acschemneuro.6b00051
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Exosomal MicroRNAs in Military Personnel with Mild Traumatic Brain Injury: Preliminary Results from the Chronic Effects of Neurotrauma Consortium Biomarker Discovery Project.

    Devoto, Christina / Lai, Chen / Qu, Bao-Xi / Guedes, Vivian A / Leete, Jacqueline / Wilde, Elisabeth / Walker, William C / Diaz-Arrastia, Ramon / Kenney, Kimbra / Gill, Jessica

    Journal of neurotrauma

    2020  Volume 37, Issue 23, Page(s) 2482–2492

    Abstract: Chronic symptoms after mild traumatic brain injury (mTBI) are common among veterans and service members, and represent a significant source of morbidity, with those who sustain multiple mTBIs at greatest risk. Exosomal micro-RNAs (miRNAs), mediators of ... ...

    Abstract Chronic symptoms after mild traumatic brain injury (mTBI) are common among veterans and service members, and represent a significant source of morbidity, with those who sustain multiple mTBIs at greatest risk. Exosomal micro-RNAs (miRNAs), mediators of intercellular communication, may be involved in chronic TBI symptom persistence. Exosomal miRNA (exomiR) was extracted from 153 participants enrolled in the Chronic Effect of Neurotrauma Consortium (CENC) longitudinal study (no TBI,
    MeSH term(s) Adult ; Biomarkers/blood ; Brain Concussion/blood ; Exosomes/metabolism ; Female ; Humans ; Longitudinal Studies ; Male ; MicroRNAs/blood ; Middle Aged ; Military Personnel
    Chemical Substances Biomarkers ; MicroRNAs
    Language English
    Publishing date 2020-07-02
    Publishing country United States
    Document type Journal Article ; Multicenter Study ; Observational Study ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 645092-1
    ISSN 1557-9042 ; 0897-7151
    ISSN (online) 1557-9042
    ISSN 0897-7151
    DOI 10.1089/neu.2019.6933
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Exosomal neurofilament light: A prognostic biomarker for remote symptoms after mild traumatic brain injury?

    Guedes, Vivian A / Kenney, Kimbra / Shahim, Pashtun / Qu, Bao-Xi / Lai, Chen / Devoto, Christina / Walker, William C / Nolen, Tracy / Diaz-Arrastia, Ramon / Gill, Jessica M

    Neurology

    2020  Volume 94, Issue 23, Page(s) e2412–e2423

    Abstract: Objective: To measure exosomal and plasma levels of candidate blood biomarkers in veterans with history of mild traumatic brain injury (mTBI) and test their relationship with chronic symptoms.: Methods: Exosomal and plasma levels of neurofilament ... ...

    Abstract Objective: To measure exosomal and plasma levels of candidate blood biomarkers in veterans with history of mild traumatic brain injury (mTBI) and test their relationship with chronic symptoms.
    Methods: Exosomal and plasma levels of neurofilament light (NfL) chain, tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-10, and vascular endothelial growth factor (VEGF) were measured using an ultrasensitive assay in a cohort of 195 veterans, enrolled in the Chronic Effects of Neurotrauma Consortium Longitudinal Study. We examined relationships between candidate biomarkers and symptoms of postconcussive syndrome (PCS), posttraumatic stress disorder (PTSD), and depression. Biomarker levels were compared among those with no traumatic brain injury (TBI) (controls), 1-2 mTBIs, and repetitive (3 or more) mTBIs.
    Results: Elevated exosomal and plasma levels of NfL were associated with repetitive mTBIs and with chronic PCS, PTSD, and depression symptoms. Plasma TNF-α levels correlated with PCS and PTSD symptoms. The total number of mTBIs correlated with exosomal and plasma NfL levels and plasma IL-6. Increased number of years since the most recent TBI correlated with higher exosomal NfL and lower plasma IL-6 levels, while increased number of years since first TBI correlated with higher levels of exosomal and plasma NfL, as well as plasma TNF-α and VEGF.
    Conclusion: Repetitive mTBIs are associated with elevated exosomal and plasma levels of NfL, even years following these injuries, with the greatest elevations in those with chronic PCS, PTSD, and depression symptoms. Our results suggest a possible neuroinflammatory and axonal disruptive basis for symptoms that persist years after mTBI, especially repetitive.
    MeSH term(s) Adult ; Biomarkers ; Blast Injuries/blood ; Blast Injuries/complications ; Brain Concussion/blood ; Brain Concussion/complications ; Cross-Sectional Studies ; Depression/blood ; Depression/etiology ; Exosomes/chemistry ; Female ; Follow-Up Studies ; Humans ; Interleukin-6/blood ; Male ; Middle Aged ; Neurofilament Proteins/blood ; Post-Concussion Syndrome/blood ; Post-Concussion Syndrome/etiology ; Prognosis ; Retrograde Degeneration ; Severity of Illness Index ; Stress Disorders, Post-Traumatic/blood ; Stress Disorders, Post-Traumatic/etiology ; Tumor Necrosis Factor-alpha/analysis ; Vascular Endothelial Growth Factor A/blood ; Veterans ; Veterans Health ; Warfare
    Chemical Substances Biomarkers ; IL6 protein, human ; Interleukin-6 ; Neurofilament Proteins ; Tumor Necrosis Factor-alpha ; VEGFA protein, human ; Vascular Endothelial Growth Factor A ; neurofilament protein L
    Language English
    Publishing date 2020-05-27
    Publishing country United States
    Document type Journal Article ; Multicenter Study ; Observational Study ; Research Support, N.I.H., Intramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 207147-2
    ISSN 1526-632X ; 0028-3878
    ISSN (online) 1526-632X
    ISSN 0028-3878
    DOI 10.1212/WNL.0000000000009577
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: Extracellular Vesicle Proteins and MicroRNAs Are Linked to Chronic Post-Traumatic Stress Disorder Symptoms in Service Members and Veterans With Mild Traumatic Brain Injury.

    Guedes, Vivian A / Lai, Chen / Devoto, Christina / Edwards, Katie A / Mithani, Sara / Sass, Dilorom / Vorn, Rany / Qu, Bao-Xi / Rusch, Heather L / Martin, Carina A / Walker, William C / Wilde, Elisabeth A / Diaz-Arrastia, Ramon / Gill, Jessica M / Kenney, Kimbra

    Frontiers in pharmacology

    2021  Volume 12, Page(s) 745348

    Abstract: Symptoms of post-traumatic stress disorder (PTSD) are common in military populations, and frequently associated with a history of combat-related mild traumatic brain injury (mTBI). In this study, we examined relationships between severity of PTSD ... ...

    Abstract Symptoms of post-traumatic stress disorder (PTSD) are common in military populations, and frequently associated with a history of combat-related mild traumatic brain injury (mTBI). In this study, we examined relationships between severity of PTSD symptoms and levels of extracellular vesicle (EV) proteins and miRNAs measured in the peripheral blood in a cohort of military service members and Veterans (SMs/Vs) with chronic mTBI(s). Participants (
    Language English
    Publishing date 2021-10-06
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2587355-6
    ISSN 1663-9812
    ISSN 1663-9812
    DOI 10.3389/fphar.2021.745348
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Neuronally-derived tau is increased in experienced breachers and is associated with neurobehavioral symptoms.

    Edwards, Katie A / Greer, Kisha / Leete, Jacqueline / Lai, Chen / Devoto, Christina / Qu, Bao-Xi / Yarnell, Angela M / Polejaeva, Elena / Dell, Kristine C / LoPresti, Matthew L / Walker, Peter / Wassermann, Eric M / Carr, Walter / Stone, James R / Ahlers, Stephen T / Vorn, Rany / Martin, Carina / Gill, Jessica M

    Scientific reports

    2021  Volume 11, Issue 1, Page(s) 19527

    Abstract: Military and law enforcement breachers are exposed to many low-level blasts during their training and occupational experiences in which they detonate explosives to force entry into secured structures. There is a concern that exposure to these repetitive ... ...

    Abstract Military and law enforcement breachers are exposed to many low-level blasts during their training and occupational experiences in which they detonate explosives to force entry into secured structures. There is a concern that exposure to these repetitive blast events in career breachers could result in cumulative neurological effects. This study aimed to determine concentrations of neurofilament light (NF-L), tau, and amyloid-beta 42 (Aβ42) in serum and in neuronal-derived extracellular vesicles (EVs) in an experienced breacher population, and to examine biomarker associations with neurobehavioral symptoms. Thirty-four participants enrolled in the study: 20 experienced breachers and 14 matched military or civilian law enforcement controls. EV tau concentrations were significantly elevated in experienced breachers (0.3301 ± 0.5225) compared to controls (-0.4279 ± 0.7557; F = 10.43, p = 0.003). No statistically significant changes were observed in EV levels of NF-L or Aβ42 or in serum levels of NF-L, tau, or Aβ42 (p's > 0.05). Elevated EV tau concentrations correlated with increased Neurobehavioral Symptom Inventory (NSI) score in experienced breachers (r = 0.596, p = 0.015) and predicted higher NSI score (F(1,14) = 7.702, p = 0.015, R
    MeSH term(s) Adult ; Amyloid beta-Peptides/blood ; Amyloid beta-Peptides/metabolism ; Biomarkers ; Blast Injuries/complications ; Brain Injuries, Traumatic ; Disease Susceptibility ; Female ; Humans ; Male ; Middle Aged ; Military Personnel ; Nervous System Diseases/diagnosis ; Nervous System Diseases/etiology ; Nervous System Diseases/metabolism ; Neurofilament Proteins/blood ; Neurofilament Proteins/metabolism ; Neurons/metabolism ; Symptom Assessment ; tau Proteins/blood ; tau Proteins/metabolism
    Chemical Substances Amyloid beta-Peptides ; Biomarkers ; Neurofilament Proteins ; tau Proteins
    Language English
    Publishing date 2021-09-30
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-021-97913-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top