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  1. Article ; Online: Corrigendum for "Mass Spectrometry-Based Proteomics Analysis of Human Substantia Nigra From Parkinson's Disease Patients Identifies Multiple Pathways Potentially Involved in the Disease".

    Jang, Yura / Pletnikova, Olga / Troncoso, Juan C / Pantelyat, Alexander Y / Dawson, Ted M / Rosenthal, Liana S / Na, Chan Hyun

    Molecular & cellular proteomics : MCP

    2023  Volume 22, Issue 6, Page(s) 100570

    Language English
    Publishing date 2023-06-02
    Publishing country United States
    Document type Published Erratum
    ZDB-ID 2075924-1
    ISSN 1535-9484 ; 1535-9476
    ISSN (online) 1535-9484
    ISSN 1535-9476
    DOI 10.1016/j.mcpro.2023.100570
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Small RNA Profiles of Brain Tissue-Derived Extracellular Vesicles in Alzheimer's Disease.

    Huang, Yiyao / Driedonks, Tom A P / Cheng, Lesley / Turchinovich, Andrey / Pletniková, Olga / Redding-Ochoa, Javier / Troncoso, Juan C / Hill, Andrew F / Mahairaki, Vasiliki / Zheng, Lei / Witwer, Kenneth W

    Journal of Alzheimer's disease : JAD

    2023  

    Abstract: Background: Extracellular vesicles (EVs) and non-coding RNAs (ncRNAs) are emerging contributors to Alzheimer's disease (AD) pathophysiology. Differential abundance of ncRNAs carried by EVs may provide valuable insights into underlying disease mechanisms. ...

    Abstract Background: Extracellular vesicles (EVs) and non-coding RNAs (ncRNAs) are emerging contributors to Alzheimer's disease (AD) pathophysiology. Differential abundance of ncRNAs carried by EVs may provide valuable insights into underlying disease mechanisms. Brain tissue-derived EVs (bdEVs) are particularly relevant, as they may offer valuable insights about the tissue of origin. However, there is limited research on diverse ncRNA species in bdEVs in AD.
    Objective: This study explored whether the non-coding RNA composition of EVs isolated from post-mortem brain tissue is related to AD pathogenesis.
    Methods: bdEVs from age-matched late-stage AD patients (n = 23) and controls (n = 10) that had been separated and characterized in our previous study were used for RNA extraction, small RNA sequencing, and qPCR verification.
    Results: Significant differences of non-coding RNAs between AD and controls were found, especially for miRNAs and tRNAs. AD pathology-related miRNA and tRNA differences of bdEVs partially matched expression differences in source brain tissues. AD pathology had a more prominent association than biological sex with bdEV miRNA and tRNA components in late-stage AD brains.
    Conclusions: Our study provides further evidence that EV non-coding RNAs from human brain tissue, including but not limited to miRNAs, may be altered and contribute to AD pathogenesis.
    Language English
    Publishing date 2023-09-28
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1440127-7
    ISSN 1875-8908 ; 1387-2877
    ISSN (online) 1875-8908
    ISSN 1387-2877
    DOI 10.3233/JAD-230872
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Ubiquitin-positive astrogliopathy clinically mimicking Parkinson's disease.

    Morris, Meaghan / Moghekar, Abhay / Guo, Haidan / Pletnikova, Olga / Redding-Ochoa, Javier / Albert, Marilyn / Resnick, Susan M / Chen, Liam

    Acta neuropathologica communications

    2022  Volume 10, Issue 1, Page(s) 164

    Abstract: Several neurodegenerative pathologies can clinically mimic Parkinson's disease, including neurodegenerative diseases with glial pathology. However, the glial aggregates are typically composed of known pathogenic proteins and are associated with prominent ...

    Abstract Several neurodegenerative pathologies can clinically mimic Parkinson's disease, including neurodegenerative diseases with glial pathology. However, the glial aggregates are typically composed of known pathogenic proteins and are associated with prominent neuronal loss in the substantia nigra. Here we present an unusual case of a 91-year-old man with a clinical diagnosis of Parkinson's disease, but whose autopsy findings showed a ubiquitin-positive astrogliopathy without significant neuronal loss in the substantia nigra. These glial aggregates affected the basal ganglia, cortex, and cerebellum, and were negative for tau, alpha-synuclein, TDP-43, FUS, and p62. This case is a rare example of an unknown glial neurodegenerative pathology mimicking Parkinson's disease without significant loss of nigral dopaminergic neurons.
    MeSH term(s) Humans ; Male ; Aged, 80 and over ; Parkinson Disease/pathology ; Ubiquitin/metabolism ; alpha-Synuclein/metabolism ; Substantia Nigra/metabolism ; Neurodegenerative Diseases/pathology ; Neuroglia/pathology
    Chemical Substances Ubiquitin ; alpha-Synuclein
    Language English
    Publishing date 2022-11-14
    Publishing country England
    Document type Case Reports ; Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2715589-4
    ISSN 2051-5960 ; 2051-5960
    ISSN (online) 2051-5960
    ISSN 2051-5960
    DOI 10.1186/s40478-022-01464-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Loss of Astrocytic µ Opioid Receptors Exacerbates Aversion Associated with Morphine Withdrawal in Mice: Role of Mitochondrial Respiration.

    Murlanova, Kateryna / Jouroukhin, Yan / Novototskaya-Vlasova, Ksenia / Huseynov, Shovgi / Pletnikova, Olga / Morales, Michael J / Guan, Yun / Kamiya, Atsushi / Bergles, Dwight E / Dietz, David M / Pletnikov, Mikhail V

    Cells

    2023  Volume 12, Issue 10

    Abstract: Astrocytes express mu/µ opioid receptors, but the function of these receptors remains poorly understood. We evaluated the effects of astrocyte-restricted knockout of µ opioid receptors on reward- and aversion-associated behaviors in mice chronically ... ...

    Abstract Astrocytes express mu/µ opioid receptors, but the function of these receptors remains poorly understood. We evaluated the effects of astrocyte-restricted knockout of µ opioid receptors on reward- and aversion-associated behaviors in mice chronically exposed to morphine. Specifically, one of the floxed alleles of the
    MeSH term(s) Mice ; Animals ; Morphine/adverse effects ; Astrocytes ; Receptors, Opioid ; Narcotic Antagonists/pharmacology ; Naloxone/pharmacology ; Mice, Knockout ; Receptors, Opioid, mu/genetics
    Chemical Substances Morphine (76I7G6D29C) ; Receptors, Opioid ; Narcotic Antagonists ; Naloxone (36B82AMQ7N) ; Receptors, Opioid, mu
    Language English
    Publishing date 2023-05-17
    Publishing country Switzerland
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2661518-6
    ISSN 2073-4409 ; 2073-4409
    ISSN (online) 2073-4409
    ISSN 2073-4409
    DOI 10.3390/cells12101412
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Mass Spectrometry-Based Proteomics Analysis of Human Substantia Nigra From Parkinson's Disease Patients Identifies Multiple Pathways Potentially Involved in the Disease.

    Jang, Yura / Pletnikova, Olga / Troncoso, Juan C / Pantelyat, Alexander Y / Dawson, Ted M / Rosenthal, Liana S / Na, Chan Hyun

    Molecular & cellular proteomics : MCP

    2022  Volume 22, Issue 1, Page(s) 100452

    Abstract: Parkinson's disease (PD) is the second most prevalent neurodegenerative disorder characterized by the loss of dopaminergic neurons in the substantia nigra (SN) of the brain. Despite decades of studies, the precise pathogenic mechanism of PD is still ... ...

    Abstract Parkinson's disease (PD) is the second most prevalent neurodegenerative disorder characterized by the loss of dopaminergic neurons in the substantia nigra (SN) of the brain. Despite decades of studies, the precise pathogenic mechanism of PD is still elusive. An unbiased proteomic analysis of PD patient's brain allows the identification of critical proteins and molecular pathways that lead to dopamine cell death and α-synuclein deposition and the resulting devastating clinical symptoms. In this study, we conducted an in-depth proteome analysis of human SN tissues from 15 PD patients and 15 healthy control individuals combining Orbitrap mass spectrometry with the isobaric tandem mass tag-based multiplexing technology. We identified 10,040 proteins with 1140 differentially expressed proteins in the SN of PD patients. Pathway analysis showed that the ribosome pathway was the most enriched one, followed by gamma-aminobutyric acidergic synapse, retrograde endocannabinoid signaling, cell adhesion molecules, morphine addiction, Prion disease, and PD pathways. Strikingly, the majority of the proteins enriched in the ribosome pathway were mitochondrial ribosomal proteins (mitoribosomes). The subsequent protein-protein interaction analysis and the weighted gene coexpression network analysis confirmed that the mitoribosome is the most enriched protein cluster. Furthermore, the mitoribosome was also identified in our analysis of a replication set of ten PD and nine healthy control SN tissues. This study provides potential disease pathways involved in PD and paves the way to study further the pathogenic mechanism of PD.
    MeSH term(s) Humans ; Parkinson Disease/metabolism ; Proteomics/methods ; Substantia Nigra/metabolism ; Brain/metabolism ; Neurodegenerative Diseases/metabolism
    Language English
    Publishing date 2022-11-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2075924-1
    ISSN 1535-9484 ; 1535-9476
    ISSN (online) 1535-9484
    ISSN 1535-9476
    DOI 10.1016/j.mcpro.2022.100452
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Deficient mitochondrial respiration in astrocytes impairs trace fear conditioning and increases naloxone-precipitated aversion in morphine-dependent mice.

    Murlanova, Kateryna / Jouroukhin, Yan / Huseynov, Shovgi / Pletnikova, Olga / Morales, Michael J / Guan, Yun / Baraban, Jay M / Bergles, Dwight E / Pletnikov, Mikhail V

    Glia

    2022  Volume 70, Issue 7, Page(s) 1289–1300

    Abstract: Mitochondria are abundant in the fine processes of astrocytes, however, potential roles for astrocyte mitochondria remain poorly understood. In the present study, we performed a systematic examination of the effects of abnormal oxidative phosphorylation ... ...

    Abstract Mitochondria are abundant in the fine processes of astrocytes, however, potential roles for astrocyte mitochondria remain poorly understood. In the present study, we performed a systematic examination of the effects of abnormal oxidative phosphorylation in astrocytes on several mouse behaviors. Impaired astrocyte oxidative phosphorylation was produced by astrocyte-specific deletion of the nuclear mitochondrial gene, Cox10, that encodes an accessory protein of complex IV, the protoheme:heme-O-farnesyl transferase. As expected, conditional deletion of the Cox10 gene in mice (cKO mice) significantly reduced expression of COX10 and Cytochrome c oxidase subunit I (MTCO1) of Complex IV, resulting in decreased oxidative phosphorylation without significantly affecting glycolysis. No effects of the deletion were observed on locomotor activity, anxiety-like behavior, nociception, or spontaneous alternation. Cox10 cKO female mice exhibited mildly impaired novel object recognition, while Cox10 cKO male mice were moderately deficient in trace fear conditioning. No group-related changes were observed in conditional place preference (CPP) that assessed effects of morphine on reward. In contrast to CPP, Cox10 cKO mice demonstrated significantly increased aversive behaviors produced by naloxone-precipitated withdrawal following chronic exposure to morphine, that is, jumping and avoidance behavior as assessed by conditional place aversion (CPA). Our study suggests that astrocyte oxidative phosphorylation may contribute to behaviors associated with greater cognitive load and/or aversive and stressful conditions.
    MeSH term(s) Alkyl and Aryl Transferases/metabolism ; Animals ; Astrocytes/metabolism ; Fear ; Female ; Male ; Membrane Proteins/metabolism ; Mice ; Mitochondria/metabolism ; Morphine/metabolism ; Morphine/pharmacology ; Morphine Dependence/metabolism ; Morphine Dependence/psychology ; Naloxone/metabolism ; Naloxone/pharmacology ; Narcotic Antagonists/metabolism ; Narcotic Antagonists/pharmacology ; Respiration ; Substance Withdrawal Syndrome/metabolism ; Substance Withdrawal Syndrome/psychology
    Chemical Substances Membrane Proteins ; Narcotic Antagonists ; Naloxone (36B82AMQ7N) ; Morphine (76I7G6D29C) ; Alkyl and Aryl Transferases (EC 2.5.-) ; COX10 protein, mouse (EC 2.5.1.-)
    Language English
    Publishing date 2022-03-11
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 639414-0
    ISSN 1098-1136 ; 0894-1491
    ISSN (online) 1098-1136
    ISSN 0894-1491
    DOI 10.1002/glia.24169
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Towards a human brain EV atlas: Characteristics of EVs from different brain regions, including small RNA and protein profiles.

    Huang, Yiyao / Arab, Tanina / Russell, Ashley E / Mallick, Emily R / Nagaraj, Rajini / Gizzie, Evan / Redding-Ochoa, Javier / Troncoso, Juan C / Pletnikova, Olga / Turchinovich, Andrey / Routenberg, David A / Witwer, Kenneth W

    bioRxiv : the preprint server for biology

    2023  

    Abstract: Extracellular vesicles (EVs) are released from different cell types in the central nervous system (CNS) and play roles in regulating physiological and pathological functions. Although brain-derived EVs (bdEVs) have been successfully collected from brain ... ...

    Abstract Extracellular vesicles (EVs) are released from different cell types in the central nervous system (CNS) and play roles in regulating physiological and pathological functions. Although brain-derived EVs (bdEVs) have been successfully collected from brain tissue, there is not yet a "bdEV atlas" of EVs from different brain regions. To address this gap, we separated EVs from eight anatomical brain regions of a single individual and subsequently characterized them by count, size, morphology, and protein and RNA content. The greatest particle yield was from cerebellum, while the fewest particles were recovered from the orbitofrontal, postcentral gyrus, and thalamus regions. EV surface phenotyping indicated that CD81 and CD9 were more abundant than CD63 for all regions. Cell-enriched surface markers varied between brain regions. For example, putative neuronal markers NCAM, CD271, and NRCAM were more abundant in medulla, cerebellum, and occipital regions, respectively. These findings, while restricted to tissues from a single individual, suggest that additional studies are merited to lend more insight into the links between EV heterogeneity and function in the CNS.
    Language English
    Publishing date 2023-05-13
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.05.06.539665
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Toward a human brain extracellular vesicle atlas: Characteristics of extracellular vesicles from different brain regions, including small RNA and protein profiles.

    Huang, Yiyao / Arab, Tanina / Russell, Ashley E / Mallick, Emily R / Nagaraj, Rajini / Gizzie, Evan / Redding-Ochoa, Javier / Troncoso, Juan C / Pletnikova, Olga / Turchinovich, Andrey / Routenberg, David A / Witwer, Kenneth W

    Interdisciplinary medicine

    2023  Volume 1, Issue 4, Page(s) e20230016

    Abstract: Extracellular vesicles (EVs) are released from different cell types in the central nervous system (CNS) and play roles in regulating physiological and pathological functions. Although brain-derived EVs (bdEVs) have been successfully collected from brain ... ...

    Abstract Extracellular vesicles (EVs) are released from different cell types in the central nervous system (CNS) and play roles in regulating physiological and pathological functions. Although brain-derived EVs (bdEVs) have been successfully collected from brain tissue, there is not yet a "bdEV Atlas" of EVs from different brain regions. To address this gap, we separated EVs from eight anatomical brain regions of a single individual and subsequently characterized them by count, size, morphology, and protein and RNA content. The greatest particle yield was from cerebellum, while the fewest particles were recovered from the orbitofrontal, postcentral gyrus, and thalamus regions. EV surface phenotyping indicated that CD81 and CD9 were more abundant than CD63 in all regions. Cell-enriched surface markers varied between brain regions. For example, putative neuronal markers NCAM, CD271, and NRCAM were more abundant in medulla, cerebellum, and occipital regions, respectively. These findings, while restricted to tissues from a single individual, suggest that additional studies are warranted to provide more insight into the links between EV heterogeneity and function in the CNS.
    Language English
    Publishing date 2023-08-15
    Publishing country Germany
    Document type Journal Article
    ISSN 2832-6245
    ISSN (online) 2832-6245
    DOI 10.1002/INMD.20230016
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Transcriptional Signatures of Hippocampal Tau Pathology in Primary Age-Related Tauopathy and Alzheimer's Disease.

    Stein-O'Brien, Genevieve L / Palaganas, Ryan / Meyer, Ernest M / Redding-Ochoa, Javier / Pletnikova, Olga / Guo, Haidan / Bell, William R / Troncoso, Juan C / Huganir, Richard L / Morris, Meaghan

    medRxiv : the preprint server for health sciences

    2023  

    Abstract: Background: Tau pathology is common in age-related neurodegenerative diseases. Tau pathology in primary age-related tauopathy (PART) and in Alzheimer's disease (AD) has a similar biochemical structure and anatomic distribution, which is distinct from ... ...

    Abstract Background: Tau pathology is common in age-related neurodegenerative diseases. Tau pathology in primary age-related tauopathy (PART) and in Alzheimer's disease (AD) has a similar biochemical structure and anatomic distribution, which is distinct from tau pathology in other diseases. However, the molecular changes associated with intraneuronal tau pathology in PART and AD, and whether these changes are similar in the two diseases, is largely unexplored.
    Methods: Using GeoMx spatial transcriptomics, mRNA was quantified in CA1 pyramidal neurons with tau pathology and adjacent neurons without tau pathology in 6 cases of PART and 6 cases of AD, and compared to 4 control cases without pathology. Transcriptional changes were analyzed for differential gene expression and for coordinated patterns of gene expression associated with both disease state and intraneuronal tau pathology.
    Results: Synaptic gene changes and two novel gene expression signatures associated with intraneuronal tau were identified in PART and AD. Overall, gene expression changes associated with intraneuronal tau pathology were similar in PART and AD. Synaptic gene expression was decreased overall in neurons in AD and PART compared to control cases. However, this decrease was largely driven by neurons lacking tau pathology. Synaptic gene expression was increased in tau-positive neurons compared to tau-negative neurons in disease. Two novel gene expression signatures associated with intraneuronal tau were identified by examining coordinated patterns of gene expression. Genes in the up-regulated expression pattern were enriched in calcium regulation and synaptic function pathways, specifically in synaptic exocytosis. These synaptic gene changes and intraneuronal tau expression signatures were confirmed in a published transcriptional dataset of cortical neurons with tau pathology in AD.
    Conclusions: PART and AD show similar transcriptional changes associated with intraneuronal tau pathology in CA1 pyramidal neurons, raising the possibility of a mechanistic relationship between the tau pathology in the two diseases. Intraneuronal tau pathology was also associated with increased expression of genes associated with synaptic function and calcium regulation compared to tau-negative disease neurons. The findings highlight the power of molecular analysis stratified by pathology in neurodegenerative disease and provide novel insight into common molecular pathways associated with intraneuronal tau in PART and AD.
    Language English
    Publishing date 2023-09-12
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.09.12.23295440
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Brain Tissue-Derived Extracellular Vesicles in Alzheimer's Disease Display Altered Key Protein Levels Including Cell Type-Specific Markers.

    Huang, Yiyao / Driedonks, Tom A P / Cheng, Lesley / Rajapaksha, Harinda / Routenberg, David A / Nagaraj, Rajini / Redding, Javier / Arab, Tanina / Powell, Bonita H / Pletniková, Olga / Troncoso, Juan C / Zheng, Lei / Hill, Andrew F / Mahairaki, Vasiliki / Witwer, Kenneth W

    Journal of Alzheimer's disease : JAD

    2022  Volume 90, Issue 3, Page(s) 1057–1072

    Abstract: Background: Brain tissue-derived extracellular vesicles (bdEVs) play neurodegenerative and protective roles, including in Alzheimer's disease (AD). Extracellular vesicles (EVs) may also leave the brain to betray the state of the CNS in the periphery. ... ...

    Abstract Background: Brain tissue-derived extracellular vesicles (bdEVs) play neurodegenerative and protective roles, including in Alzheimer's disease (AD). Extracellular vesicles (EVs) may also leave the brain to betray the state of the CNS in the periphery. Only a few studies have profiled the proteome of bdEVs and source brain tissue. Additionally, studies focusing on bdEV cell type-specific surface markers are rare.
    Objective: We aimed to reveal the pathological mechanisms inside the brain by profiling the tissue and bdEV proteomes in AD patients. In addition, to indicate targets for capturing and molecular profiling of bdEVs in the periphery, CNS cell-specific markers were profiled on the intact bdEV surface.
    Methods: bdEVs were separated and followed by EV counting and sizing. Brain tissue and bdEVs from age-matched AD patients and controls were then proteomically profiled. Total tau (t-tau), phosphorylated tau (p-tau), and antioxidant peroxiredoxins (PRDX) 1 and 6 were measured by immunoassay in an independent bdEV separation. Neuron, microglia, astrocyte, and endothelia markers were detected on intact EVs by multiplexed ELISA.
    Results: Overall, concentration of recovered bdEVs was not affected by AD. Proteome differences between AD and control were more pronounced for bdEVs than for brain tissue. Levels of t-tau, p-tau, PRDX1, and PRDX6 were significantly elevated in AD bdEVs compared with controls. Release of certain cell-specific bdEV markers was increased in AD.
    Conclusion: Several bdEV proteins are involved in AD mechanisms and may be used for disease monitoring. The identified CNS cell markers may be useful tools for peripheral bdEV capture.
    MeSH term(s) Humans ; Alzheimer Disease/pathology ; Proteome/metabolism ; Brain/pathology ; Extracellular Vesicles/metabolism ; Neurons/metabolism
    Chemical Substances Proteome
    Language English
    Publishing date 2022-10-05
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 1440127-7
    ISSN 1875-8908 ; 1387-2877
    ISSN (online) 1875-8908
    ISSN 1387-2877
    DOI 10.3233/JAD-220322
    Database MEDical Literature Analysis and Retrieval System OnLINE

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