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  1. Article: Endothelial KCa channels: Novel targets to reduce atherosclerosis-driven vascular dysfunction.

    Vera, O Daniel / Wulff, Heike / Braun, Andrew P

    Frontiers in pharmacology

    2023  Volume 14, Page(s) 1151244

    Abstract: Elevated levels of cholesterol in the blood can induce endothelial dysfunction, a condition characterized by impaired nitric oxide production and decreased vasodilatory capacity. Endothelial dysfunction can promote vascular disease, such as ... ...

    Abstract Elevated levels of cholesterol in the blood can induce endothelial dysfunction, a condition characterized by impaired nitric oxide production and decreased vasodilatory capacity. Endothelial dysfunction can promote vascular disease, such as atherosclerosis, where macrophages accumulate in the vascular intima and fatty plaques form that impair normal blood flow in conduit arteries. Current pharmacological strategies to treat atherosclerosis mostly focus on lipid lowering to prevent high levels of plasma cholesterol that induce endothelial dysfunction and atherosclerosis. While this approach is effective for most patients with atherosclerosis, for some, lipid lowering is not enough to reduce their cardiovascular risk factors associated with atherosclerosis (e.g., hypertension, cardiac dysfunction, stroke, etc.). For such patients, additional strategies targeted at reducing endothelial dysfunction may be beneficial. One novel strategy to restore endothelial function and mitigate atherosclerosis risk is to enhance the activity of Ca
    Language English
    Publishing date 2023-03-31
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2587355-6
    ISSN 1663-9812
    ISSN 1663-9812
    DOI 10.3389/fphar.2023.1151244
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Can KCa3.1 channel activators serve as novel inhibitors of platelet aggregation?

    Wulff, Heike / Braun, Andrew P / Alper, Seth L

    Journal of thrombosis and haemostasis : JTH

    2022  Volume 20, Issue 11, Page(s) 2488–2490

    MeSH term(s) Humans ; Platelet Aggregation ; Pyrazoles/pharmacology ; Pyrazoles/therapeutic use ; Platelet Function Tests ; Intermediate-Conductance Calcium-Activated Potassium Channels
    Chemical Substances Pyrazoles ; Intermediate-Conductance Calcium-Activated Potassium Channels
    Language English
    Publishing date 2022-10-18
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 2112661-6
    ISSN 1538-7836 ; 1538-7933
    ISSN (online) 1538-7836
    ISSN 1538-7933
    DOI 10.1111/jth.15863
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A novel disease connection for TRPM2 channels.

    Braun, Andrew P

    Channels (Austin, Tex.)

    2014  Volume 8, Issue 6, Page(s) 475–476

    MeSH term(s) Animals ; Nervous System/blood supply ; Nervous System/physiopathology ; TRPM Cation Channels/metabolism
    Chemical Substances TRPM Cation Channels
    Language English
    Publishing date 2014
    Publishing country United States
    Document type Comment ; Journal Article
    ISSN 1933-6969
    ISSN (online) 1933-6969
    DOI 10.4161/19336950.2014.991255
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: sciMET-cap: High-throughput single-cell methylation analysis with a reduced sequencing burden.

    Acharya, Sonia N / Nichols, Ruth V / Rylaarsdam, Lauren E / O'Connell, Brendan L / Braun, Theodore P / Adey, Andrew C

    bioRxiv : the preprint server for biology

    2023  

    Abstract: DNA methylation is a key component of the mammalian epigenome, playing a regulatory role in development, disease, and other processes. Robust, high-throughput single-cell DNA methylation assays are now possible (sciMET); however, the genome-wide nature ... ...

    Abstract DNA methylation is a key component of the mammalian epigenome, playing a regulatory role in development, disease, and other processes. Robust, high-throughput single-cell DNA methylation assays are now possible (sciMET); however, the genome-wide nature of DNA methylation results in a high sequencing burden per cell. Here, we leverage target enrichment with sciMET to capture sufficient information per cell for cell type assignment using substantially fewer sequence reads (sciMET-cap). Sufficient off-target coverage further enables the production of near-complete methylomes for individual cell types. We characterize sciMET-cap on human PBMCs and brain (middle frontal gyrus).
    Language English
    Publishing date 2023-07-14
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.07.12.548718
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Effects of Pharmacological Inhibitors of NADPH Oxidase on Myogenic Contractility and Evoked Vasoactive Responses in Rat Resistance Arteries.

    Kendrick, Dylan J / Mishra, Ramesh C / John, Cini Mathew / Zhu, Hai-Lei / Braun, Andrew P

    Frontiers in physiology

    2022  Volume 12, Page(s) 752366

    Abstract: Reactive oxygen species (ROS), such as superoxide anions and hydrogen peroxide, are reported to contribute to the dynamic regulation of contractility in various arterial preparations, however, the situation in pressurized, myogenically active resistance ... ...

    Abstract Reactive oxygen species (ROS), such as superoxide anions and hydrogen peroxide, are reported to contribute to the dynamic regulation of contractility in various arterial preparations, however, the situation in pressurized, myogenically active resistance arteries is much less clear. In the present study, we have utilized established pharmacological inhibitors of NADPH oxidase activity to examine the potential contribution of ROS to intrinsic myogenic contractility in adult Sprague-Dawley rat resistance arteries and responses to vasoactive agents acting
    Language English
    Publishing date 2022-01-24
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2564217-0
    ISSN 1664-042X
    ISSN 1664-042X
    DOI 10.3389/fphys.2021.752366
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Turning up the heat on L-type Ca2+ channels promotes neuronal firing and seizure activity.

    Braun, Andrew P

    Channels (Austin, Tex.)

    2014  Volume 7, Issue 4, Page(s) 229–230

    Abstract: It is well recognized clinically that fever in young children (< 6 y of age) may lead to seizure activity in a small, but significant percentage of these individuals, which may have negative consequences for the developing brain and progressive cognitive ...

    Abstract It is well recognized clinically that fever in young children (< 6 y of age) may lead to seizure activity in a small, but significant percentage of these individuals, which may have negative consequences for the developing brain and progressive cognitive function. In rodent models, exposure of acute brain slices to hyperthermic temperatures (i.e., 38-41 °C) is reported to evoke membrane depolarization and increased neuronal firing, although the underlying molecular/cellular events responsible for these phenomena are not fully understood. Elevated temperature may alter membrane excitability by influencing individual ion channels within a given neuron, or alter the behavior and connectivity of neurons and glia that operate within a local network. In the present study, Radzicki and colleagues have examined the possibility that modest increases in tissue/body temperature (up to 40.5 °C) may enhance the activity of voltage-gated Ca(2+) channels, which could then promote spontaneous firing of individual neurons and greater network discharge. The results of this work indicate that fever-like temperatures positively and reversibly influence the gating properties of L-type Ca(2+) channels, and that the L-type blocker nimodipine reduces both temperature-induced increases in spontaneous neuronal firing and the incidence/duration of discharge activity in a whole animal model of febrile seizure.
    MeSH term(s) Action Potentials/drug effects ; Animals ; Calcium Channels, L-Type/metabolism ; Hippocampus/pathology ; Male ; Pyramidal Cells/physiology ; Seizures, Febrile/pathology ; Temperature
    Chemical Substances Calcium Channels, L-Type
    Language English
    Publishing date 2014-09-15
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 2262854-X
    ISSN 1933-6969 ; 1933-6969
    ISSN (online) 1933-6969
    ISSN 1933-6969
    DOI 10.4161/chan.25956
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Cigarette smoke and calcium conspire to impair CFTR function in airway epithelia.

    Braun, Andrew P

    Channels (Austin, Tex.)

    2014  Volume 8, Issue 3, Page(s) 172–173

    Abstract: To maintain health and function in response to inhaled environmental irritants and toxins, the lungs and airways depend upon an innate defense system that involves the secretion of mucus (i.e., mucin, salts, and water) by airway epithelium onto the ... ...

    Abstract To maintain health and function in response to inhaled environmental irritants and toxins, the lungs and airways depend upon an innate defense system that involves the secretion of mucus (i.e., mucin, salts, and water) by airway epithelium onto the apical surface to trap foreign particles. Airway mucus is then transported in an oral direction via ciliary beating and coughing, which helps to keep the airways clear. CFTR (cystic fibrosis transmembrane conductance regulator) is a cAMP-regulated Cl(-) channel in the apical membrane of epithelium that contributes to salt and water secretion onto the luminal surface of airways, thereby ensuring that secreted mucus is sufficiently hydrated for movement along the epithelial surface. Dehydration of airway mucus, as occurs in cystic fibrosis, results in a more viscous, less mobile secretion that compromises the lung’s innate defense system by facilitating a build-up of foreign particles and bacterial growth. Related to this situation is chronic obstructive pulmonary disease (COPD), which is a leading cause of death globally. A major cause of COPD is cigarette smoking, which has been reported to decrease the cellular levels of CFTR in airway epithelia. In their recent article, Rasmussen and coworkers now report that exposure to cigarette smoke elevates cytosolic free Ca(2+) in airway epithelium, leading to decreased surface localization and cellular expression of CFTR and reduced levels of secreted airway surface liquid. Blocking this increase in cytosolic Ca(2+) largely prevented CFTR loss in airway epithelium and surprisingly, cellular lysosomes appear to be a major source for smoke-induced Ca(2+) elevation.
    MeSH term(s) Calcium/adverse effects ; Calcium/metabolism ; Cystic Fibrosis Transmembrane Conductance Regulator/genetics ; Cystic Fibrosis Transmembrane Conductance Regulator/metabolism ; Epithelium/drug effects ; Epithelium/metabolism ; Humans ; Lung/drug effects ; Lung/metabolism ; Respiratory Mucosa/drug effects ; Respiratory Mucosa/metabolism ; Smoking/adverse effects
    Chemical Substances Cystic Fibrosis Transmembrane Conductance Regulator (126880-72-6) ; Calcium (SY7Q814VUP)
    Language English
    Publishing date 2014-04-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2262854-X
    ISSN 1933-6969 ; 1933-6969
    ISSN (online) 1933-6969
    ISSN 1933-6969
    DOI 10.4161/chan.28970
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Some assembly required: SOCE and Orai1 channels couple to NFAT transcriptional activity via calmodulin and calcineurin.

    Braun, Andrew P

    Channels (Austin, Tex.)

    2014  Volume 8, Issue 5, Page(s) 383–384

    Abstract: Advances in our ability to monitor the temporal and spatial dynamics of intracellular second messengers such as Ca(2+) and cyclic nucleotides at millisecond and sub-micron levels of resolution have greatly increased our understanding of cellular signal ... ...

    Abstract Advances in our ability to monitor the temporal and spatial dynamics of intracellular second messengers such as Ca(2+) and cyclic nucleotides at millisecond and sub-micron levels of resolution have greatly increased our understanding of cellular signal transduction mechanisms. Thus, it is now well appreciated that second messengers can rise and fall within discrete regions of the intracellular compartment, as opposed to global changes, and on a time scale determined by the local collection of signaling molecules responsible for the synthesis and degradation/re-uptake of the second messenger. Efforts to identify the components of such macromolecular signaling domains have revealed the presence of hormone receptors, modifying enzymes and scaffolding proteins that tend to assemble and organize these complexes. Emerging evidence now suggests that these signal transduction entities need not be pre-existing, static complexes within the cell, but in fact, may dynamically assemble in response to a specific stimulus. Such an arrangement would thus allow key signaling molecules to be trafficked where they are needed, thereby allowing a cell to utilize these resources more effectively. On the flip side, having such molecules constantly remain within a single cellular domain would facilitate rapid signaling responses and help maintain fidelity of the pathway.
    MeSH term(s) Calcium Channels/metabolism ; Calmodulin/metabolism ; Humans ; Ion Channel Gating/physiology ; Membrane Proteins/metabolism ; Neoplasm Proteins/metabolism
    Chemical Substances Calcium Channels ; Calmodulin ; Membrane Proteins ; Neoplasm Proteins
    Language English
    Publishing date 2014
    Publishing country United States
    Document type Comment ; Journal Article
    ISSN 1933-6969
    ISSN (online) 1933-6969
    DOI 10.4161/19336950.2014.951250
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: CRACking the structure of Orai: new work reveals the intramolecular properties of a store-operated, calcium influx channel.

    Braun, Andrew P

    Channels (Austin, Tex.)

    2013  Volume 7, Issue 2, Page(s) 71–73

    MeSH term(s) Animals ; Calcium/chemistry ; Calcium Channels/chemistry ; Drosophila Proteins/chemistry ; Membrane Proteins/chemistry
    Chemical Substances Calcium Channels ; Drosophila Proteins ; Membrane Proteins ; Calcium (SY7Q814VUP)
    Language English
    Publishing date 2013-03-01
    Publishing country United States
    Document type Journal Article ; Comment
    ZDB-ID 2262854-X
    ISSN 1933-6969 ; 1933-6969
    ISSN (online) 1933-6969
    ISSN 1933-6969
    DOI 10.4161/chan.24163
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Regional Anesthesia for Arthroscopic Knee Repair in a Patient With Hypertrophic Obstructive Cardiomyopathy (HOCM) Under Monitored Anesthesia Care With Dexmedetomidine Infusion.

    Cunningham, Julie J / Braun, Andrew S / Hussey, Patrick / Momaya, Amit / Kukreja, Promil

    Cureus

    2024  Volume 16, Issue 2, Page(s) e53862

    Abstract: Patients with hypertrophic obstructive cardiomyopathy (HOCM) who are scheduled for elective, noncardiac surgery present a distinctive challenge for perioperative healthcare providers. The use of general anesthesia and neuraxial anesthesia carries the ... ...

    Abstract Patients with hypertrophic obstructive cardiomyopathy (HOCM) who are scheduled for elective, noncardiac surgery present a distinctive challenge for perioperative healthcare providers. The use of general anesthesia and neuraxial anesthesia carries the risk of unpredictable hemodynamic changes and potential complications. Regional anesthesia (RA) emerges as a prudent and effective option for HOCM patients. RA provides advantages such as minimizing hemodynamic fluctuations, avoiding intubation, reducing pharmacologic side effects, facilitating enhanced recovery after surgery, and contributing to greater patient satisfaction. We share the case of a 15-year-old individual diagnosed with HOCM and exercise intolerance, undergoing arthroscopic repair for right patellar instability. In this instance, the patient received preoperative peripheral nerve blocks for surgical anesthesia and underwent repair utilizing monitored anesthesia care (MAC) with a dexmedetomidine (DEX) infusion.
    Language English
    Publishing date 2024-02-08
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.53862
    Database MEDical Literature Analysis and Retrieval System OnLINE

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