The blood-brain barrier, a specialized physiological shield, prevents most conventional chemotherapeutics from adequately reaching brain tumors, creating a significant pharmacological obstacle. Concurrently, the central nervous system exhibits an inherently “cold” immune microenvironment — a state characterized by limited immune activity — which further complicates efforts to mount an effective immune response against residual glioblastoma cells that infiltrate healthy brain tissue and evade surgical excision. Traditional post-surgical wafers releasing radiation or chemotherapeutic agents suffer from a lack of specificity and limited clinical efficacy, underscoring the urgent need for innovative, targeted therapies.

Jonathan Forbes, MD, principal investigator and neurosurgery expert at UC, emphasizes the unprecedented opportunity surgery offers. The resection cavity, a surgically accessible void left behind after tumor removal, is microscopically burdened with infiltrative cancer cells challenging to eradicate. By deploying an immunotherapeutic device directly within this microsite, the strategy aims to manipulate the local immune environment precisely where residual malignant cells persist, potentially transforming the brain from an immunologically inert zone into a robust battleground against cancer.

Selecting the optimal immunostimulatory molecule was paramount. The investigation converged on Interleukin-15 (IL-15), a cytokine known for its potent activation of immune effector cells integral to cancer cell recognition and destruction. IL-15 not only promotes the survival and proliferation of natural killer cells and cytotoxic T lymphocytes but also enhances their cytolytic capacity, hallmark features essential for orchestrating a coordinated immune assault on glioblastoma, which notoriously resists many conventional immunotherapies.

The Ride Cincinnati grant of $40,000 is integral to advancing validation experiments utilizing a revolutionary glioblastoma-on-a-chip platform, developed collaboratively with biomedical engineer Ricardo Barrile, PhD. This technology transcends the limitations of traditional cell culture and animal models by fabricating a three-dimensional, human-relevant microphysiological system. The chip mimics the native brain tumor microenvironment, integrating human brain cells alongside glioblastoma cells with precision-engineered vascular and immune system analogs, enabling detailed interrogation of drug effects in a controlled and clinically pertinent context.

Barrile’s engineering feat leverages advanced 3D bioprinting and microfluidic systems to recreate crucial biological interfaces. The chip incorporates a bioprinted blood vessel channel simulating drug transport dynamics from the bloodstream into brain tissue, and an immune cell compartment allowing real-time observation of immune-tumor interactions. This innovative mimicry recapitulates the tumor’s complex ecosystem — essential for predicting therapeutic outcomes more accurately than conventional models, where immune components are often absent or diminished.

The significance of incorporating immune system elements cannot be overstated. Glioblastoma tumors in patients contain up to 30% immune cells, which play nuanced roles in tumor progression and resistance. Typical in vitro assays fail to preserve this heterogeneity, limiting their translational relevance. The glioblastoma-on-a-chip model’s inclusion of various immune cell populations offers a transformative tool for dissecting immune modulation by novel therapeutics such as the IL-15 wafer, enabling mechanistic insights into immune activation, suppression, and cytotoxicity within a human brain tumor milieu.

Looking toward personalized medicine, the platform holds promise for individualized therapeutic screening. By utilizing patient-derived cells on the chip, the researchers aim to simulate a patient’s unique tumor-immune landscape, providing a predictive assay to tailor immunotherapy regimens before clinical deployment. This approach could revolutionize glioblastoma management by moving away from generic treatment protocols toward bespoke strategies that maximize efficacy and minimize adverse effects.

In parallel, the UC Brain Tumor Center is pioneering methods to circumvent the blood-brain barrier’s impermeability using navigated focused ultrasound, a technique capable of transiently opening the barrier to facilitate drug delivery. When integrated with immunomodulatory wafers and physiologically accurate in vitro models, these multifaceted strategies represent a comprehensive assault on glioblastoma’s biological defenses, bringing new hope to an area where therapeutic advances have been stubbornly elusive for decades.

The interdisciplinary nature of this research, merging molecular immunology, biomedical engineering, and neurosurgical clinical practice, exemplifies modern biomedical innovation. Medical student Beatrice Zucca’s involvement highlights the project’s educational impact, fostering a new generation of researchers equipped to tackle complex challenges through cross-disciplinary collaboration. The work not only advances scientific knowledge but also carries profound personal significance for those engaged in the quest to develop curative therapies for one of the deadliest cancers known.

Continued support and expansion of such initiatives are vital to unravel glioblastoma’s layered pathology and to harness the full potential of the immune system in combating this devastating disease. By capitalizing on technological innovations like glioblastoma-on-a-chip and immunostimulatory therapeutic wafers, the University of Cincinnati team is charting a path toward more effective, patient-specific treatment paradigms that could markedly improve prognosis and quality of life for patients worldwide.

Subject of Research: Glioblastoma treatment and immunotherapy
Article Title: University of Cincinnati Pioneers Glioblastoma-on-a-Chip for Targeted Immunotherapy
News Publication Date: 2024
Web References: https://www.uc.edu/news/articles/2024/09/new-biotech-targets-brain-tumor-treatments.html
Image Credits: Photo/Andrew Higley/UC Marketing + Brand
Keywords: Glioblastomas, Brain cancer, Immunotherapy, Glioblastoma-on-a-chip, Interleukin-15, Biomedical engineering, 3D bioprinting, Microfluidics, Personalized medicine, Blood-brain barrier

Glioblastoma is an aggressive malignancy marked by rapid progression and a dismal median survival time of only eight months post-diagnosis. Traditional treatment modalities such as chemotherapy and surgery often yield limited efficacy. Immunotherapies, heralded for their revolutionary impact in multiple cancer types, have thus far failed to achieve significant success with glioblastoma due largely to the brain’s unique immune environment. The blood-brain barrier restricts immune cell infiltration, and the tumor microenvironment actively suppresses immune activity, leaving the cancer shielded from many therapeutic interventions.

TTFields therapy emerges as a novel biophysical approach, employing low-intensity, alternating electric fields to disrupt the mitotic processes of cancer cells. Delivered via strategically placed electrode arrays over the scalp, TTFields interfere with polarized intracellular components essential for cell division. This continual disruption impairs the ability of glioblastoma cells to proliferate, halting tumor growth. Moreover, patients typically wear the device for about 18 hours daily, maintaining consistent therapeutic exposure.

Beyond mere growth inhibition, the intriguing immunomodulatory effect of TTFields has captured scientific interest. The therapy appears to elevate the infiltration and persistence of tumor-fighting T cells—immune cells fundamental to cancer eradication—within and surrounding glioblastoma tissues. By fostering a more immunologically active tumor microenvironment, TTFields prime the battlefield for immunotherapy agents to exert more potent effects.

The immunotherapy employed in this study is pembrolizumab, a checkpoint inhibitor known for reinvigorating exhausted T cells by blocking the PD-1 immune checkpoint pathway. While pembrolizumab has had limited success as a standalone treatment for glioblastoma, its combination with TTFields aims to overcome the tumor’s immune evasion mechanisms by first recruiting and sustaining effector T cells locally.

Experimental evidence presented in the phase 2 clinical trial 2-THE-TOP demonstrated that administering TTFields alongside standard chemotherapy (temozolomide) and pembrolizumab led to a remarkable 70% increase in overall survival compared with historical controls treated with TTFields plus chemotherapy alone. Particularly notable was the robust benefit observed in patients with large, unresected tumors—a subgroup typically associated with poor outcomes.

In these patients, the augmented immune response likely stems from the presence of more tumor antigens, which, when combined with the disruptive electric fields, effectively ignite localized immune activation. The result is a more vigorous and sustained anti-tumor immune attack potentiated by pembrolizumab’s checkpoint blockade.

Dr. David Tran, chief of neuro-oncology at Keck Medicine and lead author, elucidates this synergy as a strategic “team sport” wherein TTFields destabilize tumor defenses, providing an opening for immunotherapy to successfully mobilize the immune system’s offensive arsenal. This dual-pronged assault overcomes the immunosuppressive barriers of glioblastoma, offering a therapeutic breakthrough.

The study enrolled 31 patients newly diagnosed with glioblastoma who had completed chemoradiation. Twenty-six participants received the tripartite treatment regimen, with six to twelve months of chemotherapy, continuous TTFields application up to 24 months, and pembrolizumab infusions every three weeks beginning after the initial chemotherapy cycles. Outcomes revealed extended survival times and elevated T cell activity, underscoring the clinical and immunological potential of the combined treatment.

Importantly, the research also opens questions about the role of surgical tumor resection in the context of these therapies. Patients unable to undergo tumor removal appeared to benefit even more significantly, suggesting that the presence of the tumor mass serves as a substrate that TTFields and immunotherapy can exploit to launch a heightened immune response. Future investigations aim to clarify this relationship and optimize treatment protocols accordingly.

Keck Medicine is now advancing this line of inquiry in a multicenter phase 3 clinical trial enrolling over 700 glioblastoma patients worldwide. This pivotal study, led by Dr. Tran as the steering committee chair, will rigorously assess the efficacy and safety of the combined TTFields, pembrolizumab, and chemotherapy approach across diverse patient populations and tumor resection statuses.

The promise of TTFields lies not only in its direct cytostatic effects but also its capacity to reshape the neuro-oncological immunological landscape—a key barrier that has thwarted many previous immunotherapeutic attempts. Its integration into comprehensive treatment regimens may ultimately redefine standards of care for glioblastoma, a cancer that for decades has defied effective longue durée management.

With ongoing research and clinical validation, TTFields combined with immunotherapy represents a beacon of hope, signaling a transformative shift toward harnessing physical and immune-mediated strategies in unison to combat one of the most formidable brain tumors known to medicine.

Subject of Research: People

Article Title: Efficacy and safety of adjuvant TTFields plus pembrolizumab and temozolomide in newly diagnosed glioblastoma: A phase 2 study

News Publication Date: 3-Jun-2025

Web References:

• Clinical Trial NCT03405792: https://clinicaltrials.gov/study/NCT03405792
• Clinical Trial NCT06556563: https://clinicaltrials.gov/study/NCT06556563

References:
Tran DD, Chen D, Le S, et al. Efficacy and safety of adjuvant TTFields plus pembrolizumab and temozolomide in newly diagnosed glioblastoma: A phase 2 study. Med. 2025; doi:10.1016/j.medj.2025.100708.

Image Credits: Image used with permission from Novocure GmbH

Keywords: Glioblastomas, Brain cancer, Cancer, Immunotherapy, Health and medicine

Glioblastoma is characterized by its highly immunosuppressive microenvironment, which poses a unique challenge to therapeutic interventions. The traditional methods of treatment, including surgical resection, radiation, and chemotherapy, have proven inadequate. The study, led by Dr. Ashish H. Shah, indicates that suppressing a protein known as ZNF638 can trigger an antiviral immune response within the tumor. This discovery not only offers a potential new treatment avenue but also suggests the possibility of using ZNF638 as a biomarker for personalizing immunotherapy for glioblastoma patients.

In the field of oncology, immune checkpoint inhibitors (ICIs) have revolutionized the treatment of various cancers by allowing the immune system to better recognize and attack tumor cells. However, the application of these therapies in brain cancers, especially glioblastoma, has been limited due to the immune-suppressive environment of the brain tumors. According to Dr. Shah, conventional immunotherapy approaches have failed to yield significant improvements for glioblastoma patients, necessitating the exploration of alternative strategies, such as viral mimicry.

The concept of viral mimicry hinges on the idea of confusing the immune system into responding as if it were encountering a viral infection. By manipulating ancient viral fragments embedded within the human genome, researchers aim to activate an immune response robust enough to combat tumor cells. This technique has been previously utilized successfully in treating other cancer types; however, its translation to glioblastoma successfully marks a significant advancement in the fight against this formidable foe.

One of the critical breakthroughs of the study involved the protein ZNF638, which regulates the silencing of retroviral sequences within the genome. By suppressing ZNF638, the researchers uncovered the potential to "unsilence" these viral elements, thereby eliciting an antiviral immune response that enhances the efficacy of immune checkpoint therapies. Through comprehensive analyses of genetic data from glioblastoma patients, the research team established a direct correlation between lower ZNF638 expression levels and improved responses to ICIs, suggesting that this biomarker could pave the way for personalized treatment protocols.

In their investigations, the researchers applied advanced techniques, including cell-based experimental models and single-cell RNA sequencing, to assess how ZNF638 suppression would affect immune cell infiltration within tumors. Their findings indicated that glioblastoma tumors with reduced ZNF638 levels experienced greater infiltration of T-cells – crucial players in the immune response – alongside reduced tumor growth. These insights substantiate the potential of targeting ZNF638 as a dual-functional approach: not only enhancing the effectiveness of existing therapies but also identifying patients more likely to respond favorably to these novel treatments.

The translational implications of targeting ZNF638 do not stop here. The study’s authors envision a future where a drug designed to penetrate brain tissue and effectively inhibit ZNF638 could be developed. The anticipation is that such a therapeutic approach would generate a significant paradigm shift in the application of immunotherapy for glioblastoma, particularly in creating treatment plans tailored to individual patient needs.

Moreover, the promising preliminary results affirm the feasibility of employing ZNF638 as a clinical biomarker to predict ICI responsiveness. As glioblastoma remains one of the most lethal malignancies, any advancement that improves prognoses and treatment responses is monumental. Utilizing ZNF638 in clinical settings could transform the current one-size-fits-all approach that has characterized glioblastoma treatment into a more refined and effective model, leading to enhanced patient outcomes.

As researchers continue their work, the scientific community remains optimistic. The future of glioblastoma treatment may not just lie in targeting the tumor directly. Instead, it may hinge on harnessing and enhancing the body’s existing immune responses to recognize and eliminate these challenging cancers. Dr. Shah’s study certainly sets a precedent for future research directed at developing innovative methodologies and strategies for combating not only glioblastoma but potentially various forms of cancer that exploit similar mechanisms of immune evasion.

In conclusion, the research from the Sylvester Comprehensive Cancer Center shines a light on new possibilities within glioblastoma treatment strategies, emphasizing the significance of understanding cancer biology and the immune system’s role in this intricate battle. As we await further developments and clinical applications of these findings, the hope is that advancements will soon translate into tangible benefits for glioblastoma patients facing this formidable adversary.

Subject of Research: Glioblastoma Treatment with Viral Mimicry
Article Title: "Activating Antiviral Immune Responses Potentiates Immune Checkpoint Inhibition in Glioblastoma Models"
News Publication Date: March 17, 2025
Web References: Sylvester Comprehensive Cancer Center
References: DOI: 10.1172/JCI183745
Image Credits: Photo by Sylvester Cancer

Keywords: Glioblastoma, Viral Mimicry, Immune Checkpoint Inhibitors, ZNF638, Personalized Treatment, Antiviral Immune Response, Cancer Biology.