Browsing Bergen Open Research Archive by Author "Akkouh, Ibrahim"
Now showing items 1-10 of 10
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All-Optical Electrophysiology in hiPSC-Derived Neurons With Synthetic Voltage Sensors
Puppo, Francesca; Sadegh, Sanaz; Trujillo, Cleber A.; Thunemann, Martin; Campbell, Evan P.; Vandenberghe, Matthieu; Shan, Xiwei; Akkouh, Ibrahim; Miller, Evan W.; Bloodgood, Brenda L.; Silva, Gabriel A.; Dale, Anders M.; Einevoll, Gaute; Djurovic, Srdjan; Andreassen, Ole Andreas; Muotri, Alysson R.; Devor, Anna (Journal article; Peer reviewed, 2021)Voltage imaging and “all-optical electrophysiology” in human induced pluripotent stem cell (hiPSC)-derived neurons have opened unprecedented opportunities for high-throughput phenotyping of activity in neurons possessing ... -
Cannabis Use Is Associated With Increased Levels of Soluble gp130 in Schizophrenia but Not in Bipolar Disorder
Szabo, Attila; Akkouh, Ibrahim; Ueland, Thor; Lagerberg, Trine Vik; Dieset, Ingrid; Bjella, Thomas; Aukrust, Pål; Le Hellard, Stephanie; Stavrum, Anne-Kristin; Melle, Ingrid; Andreassen, Ole Andreas; Djurovic, Srdjan (Journal article; Peer reviewed, 2020)The complex effects of plant cannabinoids on human physiology is not yet fully understood, but include a wide spectrum of effects on immune modulation. The immune system and its inflammatory effector pathways are recently ... -
Decreased IL-1β-induced CCL20 response in human iPSC-astrocytes in schizophrenia: Potential attenuating effects on recruitment of regulatory T cells
Akkouh, Ibrahim; Ueland, Thor; Hansson, Lars; Inderhaug, Elin; Hughes, Timothy; Steen, Nils Eiel; Aukrust, Pål; Andreassen, Ole Andreas; Szabo, Attila; Djurovic, Srdjan (Journal article; Peer reviewed, 2020)Schizophrenia (SCZ) is a severe mental disorder with a high heritability. Although its pathophysiology is mainly unknown, dysregulated immune activation and inflammation have recently emerged as possible candidates in the ... -
Derivation and Molecular Characterization of a Morphological Subpopulation of Human iPSC Astrocytes Reveal a Potential Role in Schizophrenia and Clozapine Response
Akkouh, Ibrahim; Hribkova, Hana; Grabiec, Marta; Budinska, Eva; Szabo, Attila; Kasparek, Tomas; Andreassen, Ole Andreas; Sun, Yuh-Man; Djurovic, Srdjan (Journal article; Peer reviewed, 2021)Astrocytes are the most abundant cell type in the human brain and are important regulators of several critical cellular functions, including synaptic transmission. Although astrocytes are known to play a central role in ... -
Exploring lithium's transcriptional mechanisms of action in bipolar disorder: a multi-step study
Akkouh, Ibrahim; Skrede, Silje; Holmgren, Asbjørn; Ersland, Kari Merete; Hansson, Lars Johan Axel; Bahrami, Shahram; Andreassen, Ole Andreas; Steen, Vidar Martin; Djurovic, Srdjan; Hughes, Timothy (Peer reviewed; Journal article, 2019)Lithium has been the first-line treatment for bipolar disorder (BD) for more than six decades. Although the molecular effects of lithium have been studied extensively and gene expression changes are generally believed to ... -
Expression of TCN1 in Blood is Negatively Associated with Verbal Declarative Memory Performance
Akkouh, Ibrahim; Ueland, Torill; Andreassen, Ole Andreas; Brattbakk, Hans-Richard; Steen, Vidar Martin; Hughes, Timothy; Djurovic, Srdjan (Peer reviewed; Journal article, 2018-08-23)Memory is indispensable for normal cognitive functioning, and the ability to store and retrieve information is central to mental health and disease. The molecular mechanisms underlying complex memory functions are largely ... -
Lithium increases mitochondrial respiration in iPSC-derived neural precursor cells from lithium responders
Osete, Jordi Requena; Akkouh, Ibrahim; Reis de Assis, Denis; Szabo, Attila; Frei, Evgeniia; Hughes, Timothy; Smeland, Olav Bjerkehagen; Steen, Nils Eiel; Andreassen, Ole Andreas; Djurovic, Srdjan (Journal article; Peer reviewed, 2021)Lithium (Li), valproate (VPA) and lamotrigine (LTG) are commonly used to treat bipolar disorder (BD). While their clinical efficacy is well established, the mechanisms of action at the molecular level are still incompletely ... -
Runaway multi-allelic copy number variation at the α-defensin locus in African and Asian populations
Hughes, Timothy; Hansson, Lars; Akkouh, Ibrahim; Hajdarevic, Riad; Bringsli, Jorunn; Torsvik, Anja; Inderhaug, Elin; Steen, Vidar Martin; Djurovic, Srdjan (Journal article; Peer reviewed, 2020-06-04)Alpha defensins are anti-microbial peptides of the innate immune system. The defensin A1 and A3 genes are located in a repeat array of variable copy number (the DEFA1A3 locus) and encode the human neutrophil peptides 1, 2 ... -
Transcriptome analysis reveals disparate expression of inflammation-related miRNAs and their gene targets in iPSC-astrocytes from people with schizophrenia
Akkouh, Ibrahim; Hughes, Timothy; Steen, Vidar Martin; Glover, Joel; Andreassen, Ole Andreas; Djurovic, Srdjan; Szabo, Attila (Journal article; Peer reviewed, 2021)Despite the high heritability of schizophrenia (SCZ), details of its pathophysiology and etiology are still unknown. Recent findings suggest that aberrant inflammatory regulation and microRNAs (miRNAs) are involved. Here ... -
Using iPSC Models to Understand the Role of Estrogen in Neuron–Glia Interactions in Schizophrenia and Bipolar Disorder
de Assis, Denis; Szabo, Attila; Osete, Jordi Requena; Puppo, Francesca; O'Connell, Kevin S.; Akkouh, Ibrahim; Hughes, Timothy; Frei, Evgeniia; Andreassen, Ole Andreas; Djurovic, Srdjan (Journal article; Peer reviewed, 2021)Schizophrenia (SCZ) and bipolar disorder (BIP) are severe mental disorders with a considerable disease burden worldwide due to early age of onset, chronicity, and lack of efficient treatments or prevention strategies. ...