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  1. Article: Editorial: Molecular mechanisms underlying

    Gallo, Jean-Marc / Nishimura, Agnes / Haapasalo, Annakaisa

    Frontiers in cellular neuroscience

    2024  Volume 17, Page(s) 1357319

    Language English
    Publishing date 2024-01-08
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2452963-1
    ISSN 1662-5102
    ISSN 1662-5102
    DOI 10.3389/fncel.2023.1357319
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Patient-derived skin fibroblasts as a model to study frontotemporal lobar degeneration.

    Hoffmann, Dorit / Haapasalo, Annakaisa

    Neural regeneration research

    2022  Volume 17, Issue 12, Page(s) 2669–2671

    Language English
    Publishing date 2022-05-17
    Publishing country India
    Document type Journal Article
    ZDB-ID 2388460-5
    ISSN 1876-7958 ; 1673-5374
    ISSN (online) 1876-7958
    ISSN 1673-5374
    DOI 10.4103/1673-5374.335814
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A report from the 8th Kuopio Alzheimer Symposium.

    Haapasalo, Annakaisa / Hiltunen, Mikko

    Neurodegenerative disease management

    2018  Volume 8, Issue 5, Page(s) 289–299

    Abstract: The international Kuopio Alzheimer Symposium was organized by the University of Eastern Finland in Kuopio, Finland on June 6-8, 2018 for the 8th time. Approximately 300 researchers in the fields of neuroscience and neurology from 12 different countries ... ...

    Abstract The international Kuopio Alzheimer Symposium was organized by the University of Eastern Finland in Kuopio, Finland on June 6-8, 2018 for the 8th time. Approximately 300 researchers in the fields of neuroscience and neurology from 12 different countries around the world gathered to Kuopio to hear and discuss about the latest insights into the mechanisms and comorbidities and novel approaches for diagnosis, prediction, prevention and therapies of Alzheimer's disease and other neurodegenerative diseases. The 2-day international program on June 7-8 included a keynote session, five oral scientific sessions and a poster session. The international symposium was preceded by a 'Memory Day' on June 6, held in Finnish and targeted to Finnish healthcare professionals, including doctors, psychologists and nurses, who work daily with patients suffering from neurodegenerative diseases.
    MeSH term(s) Alzheimer Disease/complications ; Alzheimer Disease/diagnosis ; Alzheimer Disease/physiopathology ; Alzheimer Disease/therapy ; Animals ; Finland ; Humans
    Language English
    Publishing date 2018-08-16
    Publishing country England
    Document type Congress
    ISSN 1758-2032
    ISSN (online) 1758-2032
    DOI 10.2217/nmt-2018-0029
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Psychopharmacological Medication Use in Frontotemporal Dementia at the Time of Diagnosis: Comparison with Alzheimer's Disease.

    Katisko, Kasper / Krüger, Johanna / Soppela, Helmi / Hartikainen, Päivi / Haapasalo, Annakaisa / Remes, Anne M / Solje, Eino

    Journal of Alzheimer's disease : JAD

    2023  Volume 95, Issue 2, Page(s) 677–685

    Abstract: Background: Due to the significant presence of neuropsychiatric symptoms in patients with frontotemporal dementia (FTD) spectrum disorders, psychiatric misdiagnoses, diagnostic delay, and use of psychiatric treatments are common prior to the FTD ... ...

    Abstract Background: Due to the significant presence of neuropsychiatric symptoms in patients with frontotemporal dementia (FTD) spectrum disorders, psychiatric misdiagnoses, diagnostic delay, and use of psychiatric treatments are common prior to the FTD diagnosis. Furthermore, treatment of diagnosed FTD patients mainly relies on off-label psychopharmacological approaches. Currently, limited real-world data are available regarding the actual use of psychopharmacological medications in FTD.
    Objective: To evaluate psychopharmacological medication use at the time of FTD diagnosis.
    Methods: Psychopharmacological medication use was evaluated in a Finnish FTD cohort containing 222 FTD patients, including the major clinical disease phenotypes (behavioral, language, and motor variants) and genetic patients carrying the C9orf72 repeat expansion. A cohort of 214 Alzheimer's disease (AD) patients was used as a neurodegenerative disease reference group.
    Results: Active use of psychopharmacological medications at the time of diagnosis was significantly more common in FTD compared to AD, especially in the case of antidepressants (26.1% versus 15.0%, OR = 2.01, p = 0.008), antipsychotics (23.9% versus 9.3%, OR = 3.15, p < 0.001), and mood-stabilizers (6.3% versus 1.9%, OR = 2.93, p = 0.085; not statistically significant), whereas the use of cholinesterase inhibitors or memantine was nearly nonexistent in FTD patients. Female gender and behavioral variant of FTD phenotype alongside with depressive and psychotic symptoms were the most prominent factors associating with the use of these medications among the FTD spectrum patients.
    Conclusion: Use of off-label psychopharmacological medication and polypharmacy is substantially common at the time of FTD diagnosis. This likely reflects the challenges in using symptom-driven treatment approaches, especially prior to the eventual diagnosis.
    MeSH term(s) Humans ; Female ; Alzheimer Disease/diagnosis ; Alzheimer Disease/drug therapy ; Alzheimer Disease/genetics ; Frontotemporal Dementia/diagnosis ; Frontotemporal Dementia/drug therapy ; Frontotemporal Dementia/genetics ; Neurodegenerative Diseases/drug therapy ; Delayed Diagnosis ; Memantine/therapeutic use
    Chemical Substances Memantine (W8O17SJF3T)
    Language English
    Publishing date 2023-07-03
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1440127-7
    ISSN 1875-8908 ; 1387-2877
    ISSN (online) 1875-8908
    ISSN 1387-2877
    DOI 10.3233/JAD-230494
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: State-of-the-Art Methods and Emerging Fluid Biomarkers in the Diagnostics of Dementia-A Short Review and Diagnostic Algorithm.

    Solje, Eino / Benussi, Alberto / Buratti, Emanuele / Remes, Anne M / Haapasalo, Annakaisa / Borroni, Barbara

    Diagnostics (Basel, Switzerland)

    2021  Volume 11, Issue 5

    Abstract: The most common neurodegenerative dementias include Alzheimer's disease (AD), dementia with Lewy bodies (DLB), and frontotemporal dementia (FTD). The correct etiology-based diagnosis is pivotal for clinical management of these diseases as well as for the ...

    Abstract The most common neurodegenerative dementias include Alzheimer's disease (AD), dementia with Lewy bodies (DLB), and frontotemporal dementia (FTD). The correct etiology-based diagnosis is pivotal for clinical management of these diseases as well as for the suitable timing and choosing the accurate disease-modifying therapies when these become available. Enzyme-linked immunosorbent assay (ELISA)-based methods, detecting altered levels of cerebrospinal fluid (CSF) Tau, phosphorylated Tau, and Aβ-42 in AD, allowed the wide use of this set of biomarkers in clinical practice. These analyses demonstrate a high diagnostic accuracy in AD but suffer from a relatively restricted usefulness due to invasiveness and lack of prognostic value. In recent years, the development of novel advanced techniques has offered new state-of-the-art opportunities in biomarker discovery. These include single molecule array technology (SIMOA), a tool for non-invasive analysis of ultra-low levels of central nervous system-derived molecules from biofluids, such as CSF or blood, and real-time quaking (RT-QuIC), developed to analyze misfolded proteins. In the present review, we describe the history of methods used in the fluid biomarker analyses of dementia, discuss specific emerging biomarkers with translational potential for clinical use, and suggest an algorithm for the use of new non-invasive blood biomarkers in clinical practice.
    Language English
    Publishing date 2021-04-27
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2662336-5
    ISSN 2075-4418
    ISSN 2075-4418
    DOI 10.3390/diagnostics11050788
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Brainstem atrophy is linked to extrapyramidal symptoms in frontotemporal dementia.

    Heikkinen, Sami / Cajanus, Antti / Katisko, Kasper / Hartikainen, Päivi / Vanninen, Ritva / Haapasalo, Annakaisa / Krüger, Johanna / Remes, Anne M / Solje, Eino

    Journal of neurology

    2022  Volume 269, Issue 8, Page(s) 4488–4497

    Abstract: Extrapyramidal (EP) symptoms are a known feature in a subpopulation of patients with behavioral variant frontotemporal dementia (bvFTD). Concomitant EP symptoms with FTD-like neuropsychiatric symptoms are also core features in progressive supranuclear ... ...

    Abstract Extrapyramidal (EP) symptoms are a known feature in a subpopulation of patients with behavioral variant frontotemporal dementia (bvFTD). Concomitant EP symptoms with FTD-like neuropsychiatric symptoms are also core features in progressive supranuclear palsy (PSP) and corticobasal degeneration (CBD). This complicates the early diagnosis of these disorders. Our retrospective register study aimed to discover imaging (MRI and FDG-PET) biomarkers to differentiate PSP, CBD, and bvFTD patients with extrapyramidal symptoms (EP +) from bvFTD patients without EP symptoms (EP-). The records of 2751 patients were screened for the diagnoses and presence of EP symptoms. A total of 222 patients were submitted to imaging analysis and applicable imaging data were recovered from 139 patients. Neuroimaging data were analyzed using Freesurfer software. In the whole cohort, EP + patients showed lower volumes of gray matter compared to EP- patients in the putamen (p = 0.002), bilateral globus pallidum (p = 0.002, p = 0.042), ventral diencephalon (p = 0.002) and brain stem (p < 0.001). In the bvFTD subgroup, there was volumetric difference between EP + and EP- patients in the brain stem. FDG-PET scans in the bvFTD patient subgroup showed that EP + patients had comparative hypometabolism of the superior cerebellar peduncle (SCP) and the frontal lobes. We discovered that EP symptoms are linked to brainstem atrophy in bvFTD patients and the whole cohort. Also, evident hypometabolism in the SCP of bvFTD EP + patients was detected as compared to bvFTD EP- patients. This could indicate that the EP symptoms in these diseases have a more caudal origin in the brainstem than in Parkinson's disease.
    MeSH term(s) Atrophy ; Basal Ganglia Diseases/diagnostic imaging ; Brain Stem ; Fluorodeoxyglucose F18 ; Frontotemporal Dementia/complications ; Frontotemporal Dementia/diagnostic imaging ; Humans ; Magnetic Resonance Imaging ; Retrospective Studies
    Chemical Substances Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Language English
    Publishing date 2022-04-04
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 187050-6
    ISSN 1432-1459 ; 0340-5354 ; 0012-1037 ; 0939-1517 ; 1619-800X
    ISSN (online) 1432-1459
    ISSN 0340-5354 ; 0012-1037 ; 0939-1517 ; 1619-800X
    DOI 10.1007/s00415-022-11095-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Traumatic Brain Injury Associates with an Earlier Onset in Sporadic Frontotemporal Dementia.

    Soppela, Helmi / Krüger, Johanna / Hartikainen, Päivi / Koivisto, Anne / Haapasalo, Annakaisa / Borroni, Barbara / Remes, Anne M / Katisko, Kasper / Solje, Eino

    Journal of Alzheimer's disease : JAD

    2022  Volume 91, Issue 1, Page(s) 225–232

    Abstract: Background: Currently, there are few studies considering possible modifiable risk factors of frontotemporal dementia (FTD).: Objective: In this retrospective case-control study, we evaluated whether a history of traumatic brain injury (TBI) ... ...

    Abstract Background: Currently, there are few studies considering possible modifiable risk factors of frontotemporal dementia (FTD).
    Objective: In this retrospective case-control study, we evaluated whether a history of traumatic brain injury (TBI) associates with a diagnosis of FTD or modulates the clinical phenotype or onset age in FTD patients.
    Methods: We compared the prevalence of prior TBI between individuals with FTD (N = 218) and age and sex-matched AD patients (N = 214) or healthy controls (HC; N = 100). Based on the patient records, an individual was categorized to the TBI+ group if they were reported to have suffered from TBI during lifetime. The possible associations of TBI with age of onset and disease duration were also evaluated in the whole FTD patient group or separately in the sporadic and genetic FTD groups.
    Results: The prevalence of previous TBI was the highest in the FTD group (19.3%) when compared to the AD group (13.1%, p = 0.050) or HC group (12%, p = 0.108, not significant). Preceding TBI was more often associated with the sporadic FTD cases than the C9orf72 repeat expansion-carrying FTD cases (p = 0.003). Furthermore, comparison of the TBI+ and TBI- FTD groups indicated that previous TBI was associated with an earlier onset age in the FTD patients (B = 3.066, p = 0.010).
    Conclusion: A preceding TBI associates especially with sporadic FTD and with earlier onset of symptoms. The results of this study suggest that TBI may be a triggering factor for the neurodegenerative processes in FTD. However, understanding the precise underlying mechanisms still needs further studies.
    MeSH term(s) Humans ; Frontotemporal Dementia/epidemiology ; Frontotemporal Dementia/genetics ; Frontotemporal Dementia/diagnosis ; Retrospective Studies ; Case-Control Studies ; Brain Injuries, Traumatic/complications ; Brain Injuries, Traumatic/epidemiology ; C9orf72 Protein/genetics
    Chemical Substances C9orf72 Protein
    Language English
    Publishing date 2022-10-31
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1440127-7
    ISSN 1875-8908 ; 1387-2877
    ISSN (online) 1875-8908
    ISSN 1387-2877
    DOI 10.3233/JAD-220545
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Organotypic Hippocampal Slice Cultures from Adult Tauopathy Mice and Theragnostic Evaluation of Nanomaterial Phospho-TAU Antibody-Conjugates.

    Kemppainen, Susanna / Huber, Nadine / Willman, Roosa-Maria / Zamora, Ana / Mäkinen, Petra / Martiskainen, Henna / Takalo, Mari / Haapasalo, Annakaisa / Sobrino, Tomás / González Gómez, Manuel Antonio / Piñeiro, Yolanda / Rivas, José / Himmelreich, Uwe / Hiltunen, Mikko

    Cells

    2023  Volume 12, Issue 10

    Abstract: Organotypic slice culture models surpass conventional in vitro methods in many aspects. They retain all tissue-resident cell types and tissue hierarchy. For studying multifactorial neurodegenerative diseases such as tauopathies, it is crucial to maintain ...

    Abstract Organotypic slice culture models surpass conventional in vitro methods in many aspects. They retain all tissue-resident cell types and tissue hierarchy. For studying multifactorial neurodegenerative diseases such as tauopathies, it is crucial to maintain cellular crosstalk in an accessible model system. Organotypic slice cultures from postnatal tissue are an established research tool, but adult tissue-originating systems are missing, yet necessary, as young tissue-originating systems cannot fully model adult or senescent brains. To establish an adult-originating slice culture system for tauopathy studies, we made hippocampal slice cultures from transgenic 5-month-old hTau.P301S mice. In addition to the comprehensive characterization, we set out to test a novel antibody for hyperphosphorylated TAU (pTAU, B6), with and without a nanomaterial conjugate. Adult hippocampal slices retained intact hippocampal layers, astrocytes, and functional microglia during culturing. The P301S-slice neurons expressed pTAU throughout the granular cell layer and secreted pTAU to the culture medium, whereas the wildtype slices did not. Additionally, cytotoxicity and inflammation-related determinants were increased in the P301S slices. Using fluorescence microscopy, we showed target engagement of the B6 antibody to pTAU-expressing neurons and a subtle but consistent decrease in intracellular pTAU with the B6 treatment. Collectively, this tauopathy slice culture model enables measuring the extracellular and intracellular effects of different mechanistic or therapeutic manipulations on TAU pathology in adult tissue without the hindrance of the blood-brain barrier.
    MeSH term(s) Mice ; Animals ; Tauopathies/metabolism ; Mice, Transgenic ; Neurons/metabolism ; Brain/metabolism ; Hippocampus/metabolism
    Language English
    Publishing date 2023-05-18
    Publishing country Switzerland
    Document type Journal Article ; 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/cells12101422
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Rare PMP22 variants in mild to severe neuropathy uncorrelated to plasma GDF15 or neurofilament light.

    Palu, Edouard / Järvilehto, Julius / Pennonen, Jana / Huber, Nadine / Herukka, Sanna-Kaisa / Haapasalo, Annakaisa / Isohanni, Pirjo / Tyynismaa, Henna / Auranen, Mari / Ylikallio, Emil

    Neurogenetics

    2023  Volume 24, Issue 4, Page(s) 291–301

    Abstract: Charcot-Marie-Tooth disease (CMT) is a heterogeneous set of hereditary neuropathies whose genetic causes are not fully understood. Here, we characterize three previously unknown variants in PMP22 and assess their effect on the recently described ... ...

    Abstract Charcot-Marie-Tooth disease (CMT) is a heterogeneous set of hereditary neuropathies whose genetic causes are not fully understood. Here, we characterize three previously unknown variants in PMP22 and assess their effect on the recently described potential CMT biomarkers' growth differentiation factor 15 (GDF15) and neurofilament light (NFL): first, a heterozygous PMP22 c.178G > A (p.Glu60Lys) in one mother-son pair with adult-onset mild axonal neuropathy. The variant led to abnormal splicing, confirmed in fibroblasts by reverse transcription PCR. Second, a de novo PMP22 c.35A > C (p.His12Pro), and third, a heterozygous 3.2 kb deletion predicting loss of exon 4. The latter two had severe CMT and ultrasonography showing strong nerve enlargement similar to a previous case of exon 4 loss due to a larger deletion. We further studied patients with PMP22 duplication (CMT1A) finding slightly elevated plasma NFL, as measured by the single molecule array immunoassay (SIMOA). In addition, plasma GDF15, as measured by ELISA, correlated with symptom severity for CMT1A. However, in the severely affected individuals with PMP22 exon 4 deletion or p.His12Pro, these biomarkers were within the range of variability of CMT1A and controls, although they had more pronounced nerve hypertrophy. This study adds p.His12Pro and confirms PMP22 exon 4 deletion as causes of severe CMT, whereas the previously unknown splice variant p.Glu60Lys leads to mild axonal neuropathy. Our results suggest that GDF15 and NFL do not distinguish CMT1A from advanced hypertrophic neuropathy caused by rare PMP22 variants.
    MeSH term(s) Adult ; Humans ; Hereditary Sensory and Motor Neuropathy ; Growth Differentiation Factor 15/genetics ; Intermediate Filaments ; Myelin Proteins/genetics ; Charcot-Marie-Tooth Disease/genetics ; Charcot-Marie-Tooth Disease/diagnosis ; Biomarkers
    Chemical Substances Growth Differentiation Factor 15 ; Myelin Proteins ; Biomarkers ; GDF15 protein, human ; PMP22 protein, human
    Language English
    Publishing date 2023-08-22
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1339887-8
    ISSN 1364-6753 ; 1364-6745
    ISSN (online) 1364-6753
    ISSN 1364-6745
    DOI 10.1007/s10048-023-00729-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Serum Cathepsin S Levels Do Not Show Alterations in Different Clinical, Neuropathological, or Genetic Subtypes of Frontotemporal Dementia Patients nor in Comparison to Healthy Control Individuals.

    Heikkinen, Sami / Huber, Nadine / Katisko, Kasper / Kokkola, Tarja / Hartikainen, Päivi / Krüger, Johanna / Leinonen, Ville / Korhonen, Ville E / Herukka, Sanna-Kaisa / Remes, Anne M / Borroni, Barbara / Alberici, Antonella / Libri, Ilenia / Solje, Eino / Haapasalo, Annakaisa

    Journal of Alzheimer's disease : JAD

    2023  Volume 93, Issue 2, Page(s) 395–401

    Abstract: Frontotemporal dementia (FTD) can manifest as diverse clinical phenotypes and is frequently caused by mutations in different genes, complicating differential diagnosis. This underlines the urgent need for valid biomarkers. Altered lysosomal and immune ... ...

    Abstract Frontotemporal dementia (FTD) can manifest as diverse clinical phenotypes and is frequently caused by mutations in different genes, complicating differential diagnosis. This underlines the urgent need for valid biomarkers. Altered lysosomal and immune functions proposedly contribute to FTD pathogenesis. Cathepsins, including cathepsin S, are enzymes preferentially expressed in brain in microglia, which influence lysosomal and immune function. Here, we examined whether alterations in serum cathepsin S levels associate with specific clinical, genetic, or neuropathological FTD subgroups, but no such alterations were observed. However, further research on other lysosomal proteins may reveal new biologically relevant biomarkers in FTD.
    MeSH term(s) Humans ; Frontotemporal Dementia/diagnosis ; tau Proteins/metabolism ; Brain/pathology ; Mutation/genetics ; Biomarkers ; Cathepsins/genetics ; Cathepsins/metabolism ; C9orf72 Protein/genetics
    Chemical Substances tau Proteins ; Biomarkers ; Cathepsins (EC 3.4.-) ; C9orf72 Protein
    Language English
    Publishing date 2023-04-11
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1440127-7
    ISSN 1875-8908 ; 1387-2877
    ISSN (online) 1875-8908
    ISSN 1387-2877
    DOI 10.3233/JAD-221060
    Database MEDical Literature Analysis and Retrieval System OnLINE

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