LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 341

Search options

  1. Article ; Online: Revisiting and Revising Memory Consolidation: Personal Reflections on the Research Legacy of Ivan Izquierdo.

    Gold, Paul E

    Neuroscience

    2022  Volume 497, Page(s) 4–13

    Abstract: ... during the first 1-2 h and the next 4-6 h after training, i.e., during the transition from short ...

    Abstract Two important themes in Ivan Izquierdo's research each offered both answers and questions about the topic of memory formation and maintenance. The first theme provided evidence supporting the view that short- and long-term memory were distinct processes and could be selectively modulated by several treatments, with some affecting only short-term, others only affecting long-term memory, and still others affecting both. Over many years, Izquierdo's laboratory documented molecular responses across time after training obtaining results that showed differences as well as similarities in the biochemical changes during the first 1-2 h and the next 4-6 h after training, i.e., during the transition from short- to long-term memory. This work clarified the biological underpinnings of the memory processes. The second theme described waves of susceptibility of memory to enhancing and impairing treatments after time, a biphasic profile that contrasted with earlier monotonic decreases in the efficacy of memory modulating treatments as a function of time between training and treatment. Remarkably, these waves of susceptibility to modification were accompanied by biphasic changes in molecular measures at similar times after training. Remarkably, some of the molecular players exhibited persistent changes after training, with increases in levels lasting days following the training experience. These persistent molecular changes may reveal a biological basis for the dynamic nature of memories seen long after the initial memory is consolidated.
    MeSH term(s) Memory/physiology ; Memory Consolidation ; Time
    Language English
    Publishing date 2022-06-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 196739-3
    ISSN 1873-7544 ; 0306-4522
    ISSN (online) 1873-7544
    ISSN 0306-4522
    DOI 10.1016/j.neuroscience.2022.05.037
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Editors' note: Tribute to James L. McGaugh.

    Quirarte, Gina L / Gold, Paul E

    Neurobiology of learning and memory

    2021  Volume 189, Page(s) 107560

    Language English
    Publishing date 2021-11-18
    Publishing country United States
    Document type Editorial
    ZDB-ID 1223366-3
    ISSN 1095-9564 ; 1074-7427
    ISSN (online) 1095-9564
    ISSN 1074-7427
    DOI 10.1016/j.nlm.2021.107560
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Hippocampus-sensitive and striatum-sensitive learning one month after morphine or cocaine exposure in male rats.

    Gardner, Robert S / Korol, Donna L / Gold, Paul E

    Pharmacology, biochemistry, and behavior

    2022  Volume 217, Page(s) 173392

    Abstract: These experiments examined whether morphine and cocaine alter the balance between hippocampal and striatal memory systems measured long after drug exposure. Male rats received injections of morphine (5 mg/kg), cocaine (20 mg/kg), or saline for five ... ...

    Abstract These experiments examined whether morphine and cocaine alter the balance between hippocampal and striatal memory systems measured long after drug exposure. Male rats received injections of morphine (5 mg/kg), cocaine (20 mg/kg), or saline for five consecutive days. One month later, rats were trained to find food on a hippocampus-sensitive place task or a striatum-sensitive response task. Relative to saline controls, morphine-treated rats exhibited impaired place learning but enhanced response learning; prior cocaine exposure did not significantly alter learning on either task. Another set of rats was trained on a dual-solution T-maze that can be solved with either place or response strategies. While a majority (67%) of control rats used place solutions, morphine treatment one month prior resulted in the exclusive use of response solutions (100%). Prior cocaine treatment did not significantly alter strategy selection. Molecular markers related to learning and drug abuse were measured in the hippocampus and striatum one month after drug exposure in behaviorally untested rats. Protein levels of glial-fibrillary acidic protein (GFAP), an intermediate filament specific to astrocytes, increased significantly in the hippocampus after morphine exposure, but not after cocaine exposure. Exposure to morphine or cocaine did not significantly change levels of brain-derived neurotrophic factor (BDNF) or a downstream target of BDNF signaling, glycogen synthase kinase 3β (GSK3β), in the hippocampus or striatum. Thus, exposure to morphine resulted in a long-lasting shift from hippocampal toward striatal dominance during learning, an effect that may be associated with lasting alterations in hippocampal astrocytes. Cocaine produced changes in the same direction, suggesting that use of a higher dose or longer duration of exposure might produce effects comparable to those seen with morphine.
    MeSH term(s) Animals ; Brain-Derived Neurotrophic Factor/metabolism ; Cocaine ; Hippocampus/metabolism ; Male ; Maze Learning ; Morphine/pharmacology ; Rats
    Chemical Substances Brain-Derived Neurotrophic Factor ; Morphine (76I7G6D29C) ; Cocaine (I5Y540LHVR)
    Language English
    Publishing date 2022-05-02
    Publishing country United States
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural
    ZDB-ID 191042-5
    ISSN 1873-5177 ; 0091-3057
    ISSN (online) 1873-5177
    ISSN 0091-3057
    DOI 10.1016/j.pbb.2022.173392
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article: Non-Destructive Monitoring of Foliar Fungicide Efficacy with Hyperspectral Sensing in Grapevine.

    Gambhir, Nikita / Paul, Angela / Qiu, Tian / Combs, David B / Hosseinzadeh, Saeed / Underhill, Anna / Jiang, Yu / Cadle-Davidson, Lance E / Gold, Kaitlin M

    Phytopathology

    2024  Volume 114, Issue 2, Page(s) 464–473

    Abstract: Frequent fungicide applications are required to manage grapevine powdery mildew ( ...

    Abstract Frequent fungicide applications are required to manage grapevine powdery mildew (
    MeSH term(s) Fungicides, Industrial/pharmacology ; Plant Diseases/prevention & control ; Sulfur ; Bacillus ; Benzophenones
    Chemical Substances metrafenone (S04CWW41HM) ; Fungicides, Industrial ; Sulfur (70FD1KFU70) ; Benzophenones
    Language English
    Publishing date 2024-02-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208889-7
    ISSN 1943-7684 ; 0031-949X
    ISSN (online) 1943-7684
    ISSN 0031-949X
    DOI 10.1094/PHYTO-02-23-0061-R
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: A cortically-weighted versus total Alberta Stroke Program Early Computed Tomography Score in thrombectomy outcome models.

    Paul, Umika / Koneru, Manisha / Siegler, James E / Penckofer, Mary / Nguyen, Thanh N / Khalife, Jane / Oliveira, Renato / Abdalkader, Mohamad / Klein, Piers / Vigilante, Nicholas / Kamen, Scott / Gold, Justin / Thomas, Ajith / Patel, Pratit

    Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association

    2024  Volume 33, Issue 5, Page(s) 107607

    Abstract: ... Validation cohort data were correctly (i.e., predicting modified Rankin score within one point) classified 50 ...

    Abstract Objectives: Individual subcortical infarct scoring for the Alberta Stroke Program Early Computed Tomography Score (ASPECTS) can be difficult and is subjected to higher inter-reader variability. This study compares performance of the 10-point ASPECTS with a new 7-point cortically-weighted score in predicting post-thrombectomy functional outcomes.
    Materials and methods: Prospective registry data from two comprehensive stroke centers (Site 1 2016-2021; Site 2: 2019-2021) included patients with either M1 segment of middle cerebral artery or internal carotid artery occlusions who underwent thrombectomy. Two multivariate proportional odds training models utilizing either 10-point or 7-point ASPECTS predicting 90-day shift in modified Rankin score were generated using Site 1 data and validated with Site 2 data. Models were compared using multiclass receiver operator characteristics, corrected Akaike's Information Criterion, and likelihood ratio test.
    Results: Of 328 patients (Site 1 = 181, Site 2 = 147), median age was 71y (IQR 61-82), 119 (36%) had internal carotid artery occlusions, and median 10-point ASPECTS was 9 (IQR 8-10). There was no difference in performance between models using either total or cortically-weighted ASPECTS (p=0.14). Validation cohort data were correctly (i.e., predicting modified Rankin score within one point) classified 50% (cortically-weighted score model) and 56% (total score model) of the time.
    Conclusions: The 7-point cortically-weighted ASPECTS was similarly predictive of post-thrombectomy functional outcome as 10-point ASPECTS. Given noninferior performance, the cortically-weighted score is a potentially reliable, but simplified, alternative to the traditional scoring paradigm, with potential implications in automated image analysis tool development.
    MeSH term(s) Humans ; Aged ; Alberta ; Stroke/diagnostic imaging ; Stroke/surgery ; Thrombectomy/adverse effects ; Tomography, X-Ray Computed ; Middle Cerebral Artery ; Treatment Outcome ; Retrospective Studies ; Brain Ischemia
    Language English
    Publishing date 2024-01-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1131675-5
    ISSN 1532-8511 ; 1052-3057
    ISSN (online) 1532-8511
    ISSN 1052-3057
    DOI 10.1016/j.jstrokecerebrovasdis.2024.107607
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Regulation of memory - from the adrenal medulla to liver to astrocytes to neurons.

    Gold, Paul E

    Brain research bulletin

    2014  Volume 105, Page(s) 25–35

    Abstract: Epinephrine, released into blood from the adrenal medulla in response to arousing experiences, is a potent enhancer of learning and memory processing. This review examines mechanisms by which epinephrine exerts its effects on these cognitive functions. ... ...

    Abstract Epinephrine, released into blood from the adrenal medulla in response to arousing experiences, is a potent enhancer of learning and memory processing. This review examines mechanisms by which epinephrine exerts its effects on these cognitive functions. Because epinephrine is largely blocked from moving from blood to brain, it is likely that the hormone's effects on memory are mediated by peripheral actions. A classic effect of epinephrine is to act at the liver to break down glycogen stores, resulting in increased blood glucose levels. The increase in blood glucose provides additional energy substrates to the brain to buttress the processes needed for an experience to be learned and remembered. In part, it appears that the increased glucose may act in the brain in a manner akin to that evident in the liver, engaging glycogenolysis in astrocytes to provide an energy substrate, in this case lactate, to augment neuronal functions. Together, the findings reveal a mechanism underlying modulation of memory that integrates the physiological functions of multiple organ systems to support brain processes. This article is part of a Special Issue entitled 'Memory enhancement'.
    MeSH term(s) Adrenal Medulla/physiology ; Animals ; Astrocytes/physiology ; Blood Glucose ; Epinephrine/metabolism ; Humans ; Liver/physiology ; Memory/physiology ; Neurons/physiology
    Chemical Substances Blood Glucose ; Epinephrine (YKH834O4BH)
    Language English
    Publishing date 2014-01-07
    Publishing country United States
    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. ; Review
    ZDB-ID 197620-5
    ISSN 1873-2747 ; 0361-9230
    ISSN (online) 1873-2747
    ISSN 0361-9230
    DOI 10.1016/j.brainresbull.2013.12.012
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: The influence of patient position on ultrasound examination of the sciatic nerve in the popliteal fossa: A cross-sectional study.

    Samet, Ron E / Dorsey, Nicolas / Sappenfield, Joshua W / Gold, Andrew K / Hsiao, Emily J / Bentzen, Soren M / Bigeleisen, Paul E

    Australasian journal of ultrasound in medicine

    2023  Volume 26, Issue 3, Page(s) 142–149

    Abstract: Introduction/purpose: Ultrasound-guided popliteal fossa sciatic nerve (PFSN) blocks are performed with patients in the supine, lateral or prone position. No known studies compare the quality of images obtained from each approach. This study examines the ...

    Abstract Introduction/purpose: Ultrasound-guided popliteal fossa sciatic nerve (PFSN) blocks are performed with patients in the supine, lateral or prone position. No known studies compare the quality of images obtained from each approach. This study examines the quality of supine and prone PFSN ultrasound images.
    Methods: Thirty-eight adult volunteers were sorted into two groups. Five regional anaesthesiologists performed ultrasound examinations of the PFSN on volunteers in supine and prone positions. Popliteal fossa sciatic nerve image quality was analysed with grayscale techniques and peer evaluation. Popliteal fossa sciatic nerve depth, distance from the popliteal crease and time until optimal imaging were recorded.
    Results: The grayscale ratio of the PFSN vs. the background was 1.83 (supine) and 1.75 (prone) (P = 0.034). Similarly, the grayscale ratio of the PFSN vs. the immediately adjacent area was 1.65 (supine) and 1.55 (prone) (P = 0.004). Mean depth of the PFSN was 1.6 cm (supine) and 1.7 cm (prone) (P = 0.009). Average distance from the popliteal crease to the PFSN was 5.9 cm (supine) and 6.6 cm (prone) (P = 0.02). Mean time to acquire optimal imaging was 36 s (supine) and 47 s (prone) (P = 0.002). Observers preferred supine positioning 53.8%, prone positioning 22.5% and no preference 23.7% of the time. Observers with strong preferences preferred supine imaging in 70.9% of cases.
    Conclusions: Supine ultrasound examination offered quicker identification of the PFSN, in a more superficial location, closer to the popliteal crease and with enhanced contrast to surrounding tissue, correlating with observer preferences for supine positioning. These results may influence ultrasound-guided PFSN block success rates, especially in difficult-to-image patients.
    Language English
    Publishing date 2023-04-12
    Publishing country Australia
    Document type Journal Article
    ZDB-ID 2843953-3
    ISSN 2205-0140 ; 1836-6864
    ISSN (online) 2205-0140
    ISSN 1836-6864
    DOI 10.1002/ajum.12342
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Inactivation of the striatum in aged rats rescues their ability to learn a hippocampus-sensitive spatial navigation task.

    Gardner, Robert S / Gold, Paul E / Korol, Donna L

    Neurobiology of learning and memory

    2020  Volume 172, Page(s) 107231

    Abstract: Studies of age-related changes in learning and memory often focus on hippocampus-sensitive tasks and reveal age-associated impairments across numerous species and contexts. However, cognitive decline with advanced age is not all-encompassing; for example, ...

    Abstract Studies of age-related changes in learning and memory often focus on hippocampus-sensitive tasks and reveal age-associated impairments across numerous species and contexts. However, cognitive decline with advanced age is not all-encompassing; for example, forms of striatum-sensitive learning are conserved or enhanced with age. Under certain conditions, hippocampal and striatal memory systems function in opposition. In young adult rodents, disruption of one structure can enhance learning on tasks dependent on the other, suggesting that competitive interactions across memory systems contribute to learning and memory abilities. This report examines whether imbalances across memory systems might contribute to cognitive aging. We inactivated the striatum using central infusions of lidocaine (sodium channel blocker) prior to hippocampus-sensitive spatial (place) training in young (3-4-month-old) and old (24-25-month-old) F344 male rats. Consistent with prior work, vehicle-infused old rats exhibited place learning impairments relative to young rats. Additionally, striatal inactivation enhanced learning in old rats, but not young rats, abolishing the age-related impairment. These findings suggest that age-related declines in learning tasks thought to engage the hippocampus may stem from exaggerated interference from other memory systems and that interventions to target the striatum may reverse some age-related learning decrements.
    MeSH term(s) Age Factors ; Animals ; Cognitive Aging/physiology ; Corpus Striatum/drug effects ; Corpus Striatum/physiology ; Hippocampus/physiology ; Lidocaine/administration & dosage ; Male ; Rats, Inbred F344 ; Spatial Navigation/drug effects ; Spatial Navigation/physiology ; Voltage-Gated Sodium Channel Blockers/administration & dosage
    Chemical Substances Voltage-Gated Sodium Channel Blockers ; Lidocaine (98PI200987)
    Language English
    Publishing date 2020-04-17
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1223366-3
    ISSN 1095-9564 ; 1074-7427
    ISSN (online) 1095-9564
    ISSN 1074-7427
    DOI 10.1016/j.nlm.2020.107231
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Time-dependent changes in hippocampal and striatal glycogen long after maze training in male rats.

    Scavuzzo, Claire J / Newman, Lori A / Gold, Paul E / Korol, Donna L

    Neurobiology of learning and memory

    2021  Volume 185, Page(s) 107537

    Abstract: Long-lasting biological changes reflecting past experience have been studied in and typically attributed to neurons in the brain. Astrocytes, which are also present in large number in the brain, have recently been found to contribute critically to ... ...

    Abstract Long-lasting biological changes reflecting past experience have been studied in and typically attributed to neurons in the brain. Astrocytes, which are also present in large number in the brain, have recently been found to contribute critically to learning and memory processing. In the brain, glycogen is primarily found in astrocytes and is metabolized to lactate, which can be released from astrocytes. Here we report that astrocytes themselves have intrinsic neurochemical plasticity that alters the availability and provision of metabolic substrates long after an experience. Rats were trained to find food on one of two versions of a 4-arm maze: a hippocampus-sensitive place task and a striatum-sensitive response task. Remarkably, hippocampal glycogen content increased while striatal levels decreased during the 30 days after rats were trained to find food in the place version, but not the response version, of the maze tasks. A long-term consequence of the durable changes in glycogen stores was seen in task-by-site differences in extracellular lactate responses activated by testing on a working memory task administered 30 days after initial training, the time when differences in glycogen content were most robust. These results suggest that astrocytic plasticity initiated by a single experience may augment future availability of energy reserves, perhaps priming brain areas to process learning of subsequent experiences more effectively.
    MeSH term(s) Animals ; Astrocytes/metabolism ; Astrocytes/physiology ; Corpus Striatum/metabolism ; Corpus Striatum/physiology ; Glycogen/metabolism ; Hippocampus/metabolism ; Hippocampus/physiology ; Lactic Acid/metabolism ; Male ; Maze Learning/physiology ; Rats ; Rats, Sprague-Dawley
    Chemical Substances Lactic Acid (33X04XA5AT) ; Glycogen (9005-79-2)
    Language English
    Publishing date 2021-10-08
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1223366-3
    ISSN 1095-9564 ; 1074-7427
    ISSN (online) 1095-9564
    ISSN 1074-7427
    DOI 10.1016/j.nlm.2021.107537
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Dual use of antifungals in medicine and agriculture: How do we help prevent resistance developing in human pathogens?

    Verweij, Paul E / Arendrup, Maiken C / Alastruey-Izquierdo, Ana / Gold, Jeremy A W / Lockhart, Shawn R / Chiller, Tom / White, P Lewis

    Drug resistance updates : reviews and commentaries in antimicrobial and anticancer chemotherapy

    2022  Volume 65, Page(s) 100885

    Abstract: Azole resistance in Aspergillus fumigatus is a One Health resistance threat, where azole fungicide exposure compromises the efficacy of medical azoles. The use of the recently authorized fungicide ipflufenoquin, which shares its mode-of-action with a new ...

    Abstract Azole resistance in Aspergillus fumigatus is a One Health resistance threat, where azole fungicide exposure compromises the efficacy of medical azoles. The use of the recently authorized fungicide ipflufenoquin, which shares its mode-of-action with a new antifungal olorofim, underscores the need for risk assessment for dual use of antifungals.
    MeSH term(s) Humans ; Antifungal Agents/pharmacology ; Antifungal Agents/therapeutic use ; Drug Resistance, Fungal ; Fungicides, Industrial/pharmacology ; Fungicides, Industrial/therapeutic use ; Azoles ; Aspergillus fumigatus ; Agriculture ; Microbial Sensitivity Tests
    Chemical Substances Antifungal Agents ; Fungicides, Industrial ; Azoles
    Language English
    Publishing date 2022-10-20
    Publishing country Scotland
    Document type Journal Article
    ZDB-ID 1474513-6
    ISSN 1532-2084 ; 1368-7646
    ISSN (online) 1532-2084
    ISSN 1368-7646
    DOI 10.1016/j.drup.2022.100885
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top