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GliomaPIONEERNCT06617208

Pilot IntraOperative Neuronal Electrophysiology in Tumor rElatEd suRgery

A study testing Neuropixel probe recording in people with Glioma and Glioblastoma (GBM), run by Erasmus Medical Center at 1 site in Netherlands.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

INTRODUCTION AND RATIONALE Aggressive brain tumors like glioma have the ability to infiltrate the surrounding healthy brain tissue, disrupting normal neuronal activities and leading to impaired motor and cognitive functions, as well as causing epilepsy. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Glioma, Glioblastoma (GBM), Brain Tumor-Glioma
What is being tested?
Neuropixel probe recording
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
20 participants
Where
1 siteNetherlands
Study dates
1 Jan 2026to 1 Jan 2030
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age >18 yrs old with radiologically diagnosed brain tumor, suspect for glioma and/or metastasis.
  • Eligible for surgical resection or biopsy procedure according to standard practice.
  • Written Informed consent.
  • Able to undergo intra-operative neuromonitoring.

Who cannot join

  • History of major psychiatric disorders (e.g., schizophrenia, bipolar disorder, or severe treatment-resistant depression)
  • Previous brain tumour surgery or radiotherapy.
  • Patient has pacemaker or other implanted electrical device such as vagal nerve stimulator or other.
  • Inability to give consent.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Koen van der Kuil contact

+31641078801

k.vanderkuil@erasmusmc.nl

Arnaud Vincent, MD PhD contact

a.vincent@erasmusmc.nl

Netherlands1 site, 1 recruiting
  • Erasmus MC, Department of Neurosurgery

    Rotterdam, South Holland, 3015GD

    Koen van der Kuil, MSc., +31 10 703 5993, k.vanderkuil@erasmusmc.nl

    Recruiting

Other trials in Netherlands

About this study

Official title: Pilot IntraOperative Neuronal Electrophysiology in Tumor rElatEd suRgery (PIONEER Study)

INTRODUCTION AND RATIONALE

Aggressive brain tumors like glioma have the ability to infiltrate the surrounding healthy brain tissue, disrupting normal neuronal activities and leading to impaired motor and cognitive functions, as well as causing epilepsy. This malignant brain tumor is considered one of the most challenging cancers to treat, with a median survival of 12 to 15 months. Recent findings on direct neuron-tumor interactions indicate that abnormal brain activity in the regions surrounding brain tumours may contribute to develop epilepsy and accelerating tumor growth. Tumors tend to 'fuel' themselves with neurotransmitters released during its 'daily' neuronal firing. Hyperactive neurons in the peritumoral cortex can form excitatory electrochemical synapses with surrounding tumor cells, creating direct communication pathways within the peritumoral microenvironment, which aids in the progression and proliferation of tumor cells via direct and paracrine signalling pathways. However, the specific features of this abnormal brain activity in the peritumoral cortex have not been fully clarified and information on the pathological changes of neuronal activity in glioma patients is largely lacking. To advance more effective treatment strategies, it is crucial to better understand the complex interactions between the tumor and the brain.

Read more

This is especially important for our group of patients of which many perceive diminished quality of life because of epilepsy, cognitive functioning and language problems after tumor surgery. Furthermore, we lack thorough understanding of what tumor resection does to the original hyperactive peritumoral cortex and if resecting this is beneficial for improving postoperative outcome both for epilepsy as well as regarding survival. Therefore, identifying the hyperactive peritumoral cortex and directly addressing its impacts on the brain function and long-term surgical outcome could be a promising novel therapeutic strategy for treating glioma patients.

STUDY AIM

Our measurement focuses on capturing neuronal activity at single-neuron resolution in the peritumoral cortex of glioma patients using cortical depth electrodes. It is well-established that gliomas can remodel the surrounding brain tissue, leading to abnormal neuronal hyperactivity, which contributes to tumor progression and epilepsy. However, the specific neuronal patterns and underlying mechanisms of these changes are not yet fully understood. Our study will aim to collect detailed single-neuron recordings in this context, enabling us to map the precise neurophysiological disruptions caused by gliomas. On the long term, our research could lay the groundwork in identifying novel therapeutic approaches by providing critical in-sights into how gliomas alter brain function.

Read the detailed description

In this study, patients with a brain tumour who undergo (awake) surgical resection as part of standard clinical care will be included. All patients who undergo such a procedure at Erasmus MC within a five-year period will be invited to participate. Based on historical case numbers, we aim to include ten patients with successful recordings during this timeframe.

The surgical procedure itself will be performed entirely according to standard clinical protocols; the surgery is not part of the research intervention. Neurological functioning will be assessed pre- and postoperatively as part of routine care. Participation in the study concludes at the end of the surgical procedure. All other procedures outside the research recordings are likewise performed within standard care.

Being tested
Neuropixel probe recording
Medical subject headings
Glioma, Glioblastoma, Brain Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Neuropixel probe recordingDevice

    Also called laminar electrophysiology, cortical depth electrophysiology

    Neuropixel recordings captures neuronal activity at the single-neuron level across the layers of the cortex.

Study groups in NCT06617208
Study groupRoleWhat they receive
Neuropixel probe recordingExperimentalCortical electrophysiology using the Neuropixel probe is performed to record brain activity in the peritumoral cortex
Receives: Device: Neuropixel probe recording

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Participants With a Successful Intraoperative Neuropixels Probe Recording

    Feasibility is reported as the number (and percentage) of enrolled participants in whom a successful Neuropixels probe recording is obtained. A recording is counted as successful when (1) the probe is inserted into the peritumoral cortex as planned, (2) neural data are acquired during surgery with at least one isolated single neuron after spike sorting, and (3) no device-related complications occur (retained probe fragments, infection, or hemorrhage). Reasons for unsuccessful recordings are documented in the case report form.

    Measured: From the beginning of surgery until hospital discharge

Secondary outcomes (1)
  1. Number of Isolated Single Neurons per Participant Recorded in Peritumoral Cortex

    To assess whether intraoperative single-cell recordings are suitable for identifying prognostic biomarkers of disease progression, the number of single neurons isolated per participant is counted after spike sorting of the Neuropixels data. Only units that meet the predefined spike-sorting quality criteria are counted. Results are summarized as median (range) across participants. For each isolated neuron, the firing rate (spikes per second) and waveform characteristics are also reported descriptively.

    Measured: From the beginning to end of surgery

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted27 Sep 2024
  2. Study start1 Jan 2026
  3. Primary completion1 Jan 2030 (estimated)
  4. Study completion1 Jan 2030 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Device feasibility
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
20 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06617208
Sponsor's protocol ID
PaNaMa 12744
Acronym
PIONEER
Status last verified
Sep 2026
First submitted
12 Sep 2024
Last updated
5 Oct 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Publications

  • Coughlin B, Munoz W, Kfir Y, Young MJ, Meszena D, Jamali M, Caprara I, Hardstone R, Khanna A, Mustroph ML, Trautmann EM, Windolf C, Varol E, Soper DJ, Stavisky SD, Welkenhuysen M, Dutta B, Shenoy KV, Hochberg LR, Mark Richardson R, Williams ZM, Cash SS, Paulk AC. Modified Neuropixels probes for recording human neurophysiology in the operating room. Nat Protoc. 2023 Oct;18(10):2927-2953. doi: 10.1038/s41596-023-00871-2. Epub 2023 Sep 11.

    PubMed 37697108
  • Paulk AC, Kfir Y, Khanna AR, Mustroph ML, Trautmann EM, Soper DJ, Stavisky SD, Welkenhuysen M, Dutta B, Shenoy KV, Hochberg LR, Richardson RM, Williams ZM, Cash SS. Large-scale neural recordings with single neuron resolution using Neuropixels probes in human cortex. Nat Neurosci. 2022 Feb;25(2):252-263. doi: 10.1038/s41593-021-00997-0. Epub 2022 Jan 31.

    PubMed 35102333
  • Chung JE, Sellers KK, Leonard MK, Gwilliams L, Xu D, Dougherty ME, Kharazia V, Metzger SL, Welkenhuysen M, Dutta B, Chang EF. High-density single-unit human cortical recordings using the Neuropixels probe. Neuron. 2022 Aug 3;110(15):2409-2421.e3. doi: 10.1016/j.neuron.2022.05.007. Epub 2022 Jun 8.

    PubMed 35679860
  • Leonard MK, Gwilliams L, Sellers KK, Chung JE, Xu D, Mischler G, Mesgarani N, Welkenhuysen M, Dutta B, Chang EF. Large-scale single-neuron speech sound encoding across the depth of human cortex. Nature. 2024 Feb;626(7999):593-602. doi: 10.1038/s41586-023-06839-2. Epub 2023 Dec 13.

    PubMed 38093008
  • Krishna S, Choudhury A, Keough MB, Seo K, Ni L, Kakaizada S, Lee A, Aabedi A, Popova G, Lipkin B, Cao C, Nava Gonzales C, Sudharshan R, Egladyous A, Almeida N, Zhang Y, Molinaro AM, Venkatesh HS, Daniel AGS, Shamardani K, Hyer J, Chang EF, Findlay A, Phillips JJ, Nagarajan S, Raleigh DR, Brang D, Monje M, Hervey-Jumper SL. Glioblastoma remodelling of human neural circuits decreases survival. Nature. 2023 May;617(7961):599-607. doi: 10.1038/s41586-023-06036-1. Epub 2023 May 3.

    PubMed 37138086
  • Venkataramani V, Yang Y, Schubert MC, Reyhan E, Tetzlaff SK, Wissmann N, Botz M, Soyka SJ, Beretta CA, Pramatarov RL, Fankhauser L, Garofano L, Freudenberg A, Wagner J, Tanev DI, Ratliff M, Xie R, Kessler T, Hoffmann DC, Hai L, Dorflinger Y, Hoppe S, Yabo YA, Golebiewska A, Niclou SP, Sahm F, Lasorella A, Slowik M, Doring L, Iavarone A, Wick W, Kuner T, Winkler F. Glioblastoma hijacks neuronal mechanisms for brain invasion. Cell. 2022 Aug 4;185(16):2899-2917.e31. doi: 10.1016/j.cell.2022.06.054. Epub 2022 Jul 31.

    PubMed 35914528
  • Venkataramani V, Tanev DI, Strahle C, Studier-Fischer A, Fankhauser L, Kessler T, Korber C, Kardorff M, Ratliff M, Xie R, Horstmann H, Messer M, Paik SP, Knabbe J, Sahm F, Kurz FT, Acikgoz AA, Herrmannsdorfer F, Agarwal A, Bergles DE, Chalmers A, Miletic H, Turcan S, Mawrin C, Hanggi D, Liu HK, Wick W, Winkler F, Kuner T. Glutamatergic synaptic input to glioma cells drives brain tumour progression. Nature. 2019 Sep;573(7775):532-538. doi: 10.1038/s41586-019-1564-x. Epub 2019 Sep 18.

    PubMed 31534219

Questions about this trial

What is this clinical trial studying?

A study testing Neuropixel probe recording in people with Glioma and Glioblastoma (GBM), run by Erasmus Medical Center at 1 site in Netherlands.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 5 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Netherlands. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Koen van der Kuil (+31641078801, k.vanderkuil@erasmusmc.nl), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Participants With a Successful Intraoperative Neuropixels Probe Recording (time frame: From the beginning of surgery until hospital discharge). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06617208, which also lists 7 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Oct 2026.

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