Joonas Haapasalo

ORCID: 0000-0002-6468-4937
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About
Contact & Profiles
Research Areas
  • Glioma Diagnosis and Treatment
  • Enzyme function and inhibition
  • Neurological disorders and treatments
  • Cancer, Hypoxia, and Metabolism
  • Renin-Angiotensin System Studies
  • Epigenetics and DNA Methylation
  • Cancer Genomics and Diagnostics
  • EEG and Brain-Computer Interfaces
  • Chromatin Remodeling and Cancer
  • Neuroscience and Neuropharmacology Research
  • Epilepsy research and treatment
  • Cholinesterase and Neurodegenerative Diseases
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Vagus Nerve Stimulation Research
  • Microtubule and mitosis dynamics
  • Radiomics and Machine Learning in Medical Imaging
  • Meningioma and schwannoma management
  • Neuroinflammation and Neurodegeneration Mechanisms
  • Synthesis and Catalytic Reactions
  • Hormonal Regulation and Hypertension
  • Parkinson's Disease Mechanisms and Treatments
  • Cancer-related molecular mechanisms research
  • Redox biology and oxidative stress
  • interferon and immune responses
  • Single-cell and spatial transcriptomics

Tampere University
2015-2025

Tampere University Hospital
2015-2025

Fimlab (Finland)
2014-2024

Hospital for Sick Children
2020-2021

SickKids Foundation
2020-2021

The University of Texas MD Anderson Cancer Center
2017

Center for Neurosciences
2016

Saint Louis University
2008

Slovak Academy of Sciences
2008

Institute of Virology of the Slovak Academy of Sciences
2008

Vagus nerve stimulation (VNS) is used for treating refractory epilepsy and major depression. While the impact of this treatment on seizures has been established, its human cognition remains equivocal. The goal study to elucidate immediate effects vagus attention, cognition, emotional reactivity in patients with epilepsy. Twenty (12 male 8 female; 45 ± 13 years old) treated VNS due participated study. Subjects performed a computer-based test executive functions embedded distractors while...

10.1080/13803395.2017.1285869 article EN Journal of Clinical and Experimental Neuropsychology 2017-02-19

BackgroundDeep brain stimulation of the anterior nucleus thalamus (ANT) is an emerging therapy for refractory focal epilepsy. However, most optimal target has not been unambiguously described.ObjectiveIn present study, we investigated correlation between site and outcome in order to define deep epilepsy.MethodsThe locations 62 contacts used 30 treatment attempts 15 prospectively followed patients during a 5 year period were assessed. Treatment classified into responding non-responding trials...

10.1016/j.brs.2015.09.014 article EN cc-by-nc-nd Brain stimulation 2015-10-14
Rahul Raj Pihla Tommiska Timo Koivisto Ville Leinonen Nils Danner and 93 more Jussi P. Posti Dan Laukka Teemu M. Luoto Minna Rauhala Sami Tetri Tommi K. Korhonen Jarno Satopää Riku Kivisaari Teemu Luostarinen Christoph Schwartz Tomasz Czuba Simo Taimela Kimmo Lönnrot Teppo L. N. Järvinen Abdirisak Ahmed Tarmo Areda Jiří Bártek Tomasz Czuba Nils Danner Antti-Pekka Elomaa Janek Frantzén Ilkka Haapala Joonas Haapasalo Juuso Heikkilä Minttu Hellman Henna Henttonen Nora Huuska Teppo L. N. Järvinen Henna-Kaisa Jyrkkänen Aku Kaipainen Olli‐Pekka Kämäräinen Hanna Kämppi Milla Kelahaara Riku Kivisaari Н Н Климко Oula A Knuutinen Timo Koivisto Tommi K. Korhonen Janne Koskimäki Anselmi Kovalainen Xenia Kuparinen Dan Laukka Martin Lehečka Kai Lehtimäki Ville Leinonen Kimmo Lönnrot Antti Luikku Teemu Luostarinen Teemu M. Luoto Janne Luotonen Lauriina Lustig-Tammi Henna-Riikka Maanpää Jenni Määttä Timo Möttönen Eliisa Netti Laura Nevaharju-Sarantis Mika Niemelä Tero Niskakangas Mette Nissinen Ville Nurminen Minna Oinas Teemu Ollonen Anna Östberg Elias Oulasvirta Krista Pantzar Katri Piilonen Anni Pohjola Markus Polvivaara Jussi P. Posti Rahul Raj Linnea Rajala Jonas Ranstam Minna Rauhala Behnam Rezai Jahromi M. Roiha Ilkka Saarenpää Antti Sajanti Henrikki Salmi Jarno Satopää Christoph Schwartz Niina Shemeikka Pia Sorto Simo Taimela Sami Tetri Tuomo Thesleff Pihla Tommiska Maarit Tuomisto Nuutti Vartiainen Ville Vasankari Jyri J. Virta Mikko Visuri Paula Walle Frederick A. Zeiler

10.1016/s0140-6736(24)00686-x article EN The Lancet 2024-06-01

Abstract Purpose: Carbonic anhydrase IX (CA IX) is a hypoxia-inducible enzyme, which associated with neoplastic growth. Ectopic CA expression has been observed in several tumors, whose normal counterparts do not express this enzyme. Normal human brain tissue shows only slight or no of IX. Experimental Design: We describe diffusely infiltrating astrocytomas. The association evaluated clinicopathologic and molecular factors including cell proliferation apoptosis as well the p53 epidermal...

10.1158/1078-0432.ccr-05-0848 article EN Clinical Cancer Research 2006-01-15

Deep brain stimulation (DBS) is a minimally invasive and reversible method to treat an increasing number of neurological psychiatric disorders, including epilepsy. Targeting poorly defined deep structures based in large degree on stereotactic atlas information, which may be major source inconsistent treatment effects. In the present study, we aimed study whether recently approved target for epilepsy (anterior nucleus thalamus, ANT) visualized clinically established 3 T MRI ANT delineated...

10.1016/j.nicl.2015.03.001 article EN cc-by-nc-nd NeuroImage Clinical 2015-01-01

Background: Deep brain stimulation (DBS) of anterior thalamic nuclei (ANT) is a novel promising therapeutic method for treating refractory epilepsy. Despite reports subjective memory impairments and mood disturbances in patients with ANT–DBS, little known its effects on cognitive affective processes. Hypothesis: The thalamus has connections to prefrontal limbic networks important control emotional reactivity. More specifically, cingulate cortex (ACC), linked ANT, been assigned roles related...

10.1080/13803395.2014.913554 article EN Journal of Clinical and Experimental Neuropsychology 2014-05-19

Rapid technological advancements have transformed the healthcare sector from traditional diagnosis and treatment to personalized health management. Biofluids such as teardrops, sweat, interstitial fluids, exhaled breath condensate offer a rich source of metabolites that can be linked physiological status an individual. More importantly, these biofluids contain biomarkers similar those in blood. Therefore, developing sensors for noninvasive determination biofluid‐based overcome traditionally...

10.1002/smsc.202300358 article EN cc-by Small Science 2024-05-18

Carbonic anhydrase XII (CA XII) is a transmembrane enzyme that associated with neoplastic growth. CA has been proposed to be involved in acidification of the extracellular milieu, creating an appropriate microenvironment for rapid tumor Because RNA sequence databases have indicated two isoforms might exist human tissues, and because alternatively spliced protein forms linked aggressive behavior cancer cells, we designed study evaluate presence diffuse astrocytomas, type known its often...

10.1215/15228517-2007-065 article EN Neuro-Oncology 2008-03-06

Abstract Background Defective iron homeostasis may be involved in the development of some diseases within central nervous system. Although expression genes normal balance has been intensively studied other tissues, little is known about their brain. We investigated mRNA levels hepcidin ( HAMP ), HFE, neogenin NEO1 transferrin receptor 1 TFRC 2 TFR2 and hemojuvelin HFE2 ) human brain, brain tumors, astrocytoma cell lines. The specimens included 5 tissue samples, 4 meningiomas, one...

10.1186/1471-2202-10-36 article EN cc-by BMC Neuroscience 2009-04-22

Medulloblastomas (MBs) and supratentorial primitive neuroectodermal tumours (PNETs) are the most common highly aggressive paediatric brain tumours. In spite of extensive research on these tumours, there only few known biomarkers or therapeutic target proteins, prognosis patients with remains poor. Our aim was to investigate whether carbonic anhydrases (CAs), enzymes commonly overexpressed in various including glioblastomas oligodendrogliomas, present MBs PNETs, their expression can be...

10.1186/1471-2407-10-148 article EN cc-by BMC Cancer 2010-04-18

Abstract The tumor immune microenvironment (TiME) of human central nervous system (CNS) tumors remains to be comprehensively deciphered. Here, we employed flow cytometry and RNA sequencing analysis for a deep data-driven dissection diverse TiME uncover noncanonical cell types in CNS by using seven from five patients. Myeloid subsets comprised classical microglia, monocyte-derived macrophages, neutrophils, two myeloid subsets: CD3 + myeloids CD19 myeloids. T lymphocyte included...

10.1007/s00262-024-03920-1 article EN cc-by Cancer Immunology Immunotherapy 2025-01-03

A substantial proportion of patients undergoing surgery for chronic subdural hematoma (CSDH) use anticoagulation medication due to atrial fibrillation (AF). We assessed the risk postoperative thromboembolic and hemorrhagic complications in CSDH with a history AF their association outcome. This posthoc analysis nationwide multicenter randomized controlled trial conducted during 2020-2022 included preoperative AF. incidence associations functional outcomes mortality. Of 589 patients, 128...

10.1007/s00701-024-06417-z article EN cc-by Acta Neurochirurgica 2025-01-16

Carbonic anhydrase isozyme II (CA II) is a cytosolic enzyme that highly expressed in most organs, including the brain, where it mainly located oligodendrocytes. Recent studies have shown its expression induced endothelium of neovessels melanoma and esophageal, renal, lung cancer. Immunological further indicate CA represents major target antigen stimulating an autoantibody response patients. These results prompted us to investigate endothelial two types brain cancer: oligodendrogliomas...

10.1215/15228517-2007-001 article EN Neuro-Oncology 2007-04-14

Carbonic anhydrase VII (CA VII) is a cytosolic enzyme expressed in several organs, including the human brain, but it has not been investigated earlier any tumors. We designed present study to evaluate CA expression cohort of diffuse astrocytomas, mixed oligoastrocytomas and oligodendrogliomas. immunostaining was correlated clinico-pathologic findings, survival data, expres-sion other molecular factors, Ki-67, p53 protein epidermal growth factor receptor. VII-positive staining observed 94%...

10.4236/health.2011.31002 article EN Health 2011-01-01

Super-refractory status epilepticus is a condition characterized by recurrence of despite use deep general anesthesia, and it has high morbidity mortality rates. We report case 17-year-old boy with prolonged super-refractory that eventually resolved after commencing brain stimulation the centromedian nucleus thalamus. Later attempt to reduce parameters resulted in immediate relapse epilepticus, suggesting pivotal role treatment response. Deep may be option when other options have failed. ANN...

10.1002/ana.24821 article EN Annals of Neurology 2016-11-10

Abstract Objectives Neurostimulation has offered new treatment options in refractory epilepsy, first with vagus nerve stimulation ( VNS ) and more recently deep brain DBS ). There is a lack of previous detailed data assessing the relationship between ANT ‐ . The aim this study was to investigate potential correlation therapeutic responses Materials Methods A total 11 patients therapy underwent implantation. Monthly seizure counts starting from baseline before extending long‐term were...

10.1002/brb3.983 article EN cc-by Brain and Behavior 2018-05-08

Chromogenic in situ hybridization (CISH) was used to detect amplification of the epidermal growth factor receptor (EGFR) gene tissue microarrays tumours derived from 287 patients with grade II-IV diffuse astrocytomas. Amplification found 32% a highly significant association histological (4% II, 21% III and 39% IV; P < 0.001). EGFR more common primary than secondary glioblastomas (41%vs. 16%, = 0.033). Overexpression mRNA protein (wild-type vIII variant) correlate (P 0.028, 0.035 0.014...

10.1111/j.1365-2990.2006.00758.x article EN Neuropathology and Applied Neurobiology 2006-04-21

Inhibitors of fibroblast growth factor receptors (FGFRs) have recently arisen as a promising treatment option for patients with FGFR alterations. Gene fusions involving FGFR3 and transforming acidic coiled-coil protein 3 (TACC3) been detected in diffuse gliomas other malignancies, fusion-positive cases responded well to inhibition. As high expression has tumors, we sought determine the clinical significance level its potential indicating fusions.We performed immunohistochemistry on tissue...

10.1093/neuonc/nox028 article EN cc-by-nc Neuro-Oncology 2017-01-01

As the progression of low-grade diffuse astrocytomas into grade 4 tumors significantly impacts patient prognosis, a better understanding this process is paramount importance for improved care. In project, we analyzed matched IDH-mutant before and after to from six patients (discovery cohort) with genome-wide sequencing, 21 additional targeted 33 Glioma Longitudinal AnalySiS cohort validation. The Cancer Genome Atlas data 595 gliomas provided supportive information. All in our discovery...

10.1186/s40478-023-01669-9 article EN cc-by Acta Neuropathologica Communications 2023-11-06

Atypical teratoid/rhabdoid tumors (AT/RTs) are pediatric brain known for their aggressiveness and aberrant but still unresolved epigenetic regulation. To better understand malignancy, we investigated how AT/RT-specific DNA hypermethylation was associated with gene expression altered transcription factor binding it is linked to upstream Medulloblastomas, choroid plexus tumors, pluripotent stem cells, fetal were used as references. A part of the genomic regions, which hypermethylated in AT/RTs...

10.26508/lsa.202302088 article EN cc-by Life Science Alliance 2024-03-18
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