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Glioblastoma therapy timing could be key to treatment

Scientists have identified a brief window after brain tumour surgery during which a treatment for glioblastoma can cross the brain’s protective barrier and reach the cancer cells most likely to trigger tumour regrowth.
The discovery could pave the way for more effective treatments for glioblastoma, the most common and aggressive form of brain cancer in adults.
Researchers from The University of Manchester found that surgery itself creates two short-lived periods when the protective membrane, known as the blood-brain barrier, becomes temporarily more permeable around the edge of the surgical cavity.
By administering cancer treatments packaged inside nanomedicines during these windows, the team showed they could selectively deliver chemotherapy to the edge of the tissue that was removed during surgery, while largely sparing healthy brain tissue.
The approach could potentially repurpose nanomedicines that are already used in clinical practice by administering them during this newly identified window.
Glioblastoma remains one of the most difficult cancers to treat. More than 70% of patients undergo surgery, yet the disease almost invariably returns because infiltrating tumour cells cannot be completely removed. Average survival remains around 12–18 months despite advances in surgery, radiotherapy and chemotherapy.
Dr Thomas Kisby, who is co-lead on the study at The University of Manchester said: “For the first time, we’ve shown that glioblastoma surgery briefly exposes a vulnerability we can exploit. If treatment is timed during specific windows we identified, it is able to halt the disease significantly before it regrows. We suggest that the hours and days immediately after surgery may hold the key to stopping glioblastoma from returning. It also raises the possibility that other established medicines could be redeployed in smarter, more strategic ways.”
The post Glioblastoma therapy timing could be key to treatment appeared first on Drug Discovery World (DDW).
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New webinar: Tackling drug discovery challenges in cancer research

Hosted by Drug Discovery World and supported by Sartorius and BioIVT, this webinar will explore the opportunities and challenges that exist within cancer research drug discovery and development.
You will hear from Dr Sudha Rao, Chief Scientific Officer of Kazia Therapeutics, Karol Budzik, PhD, Business Development Associate at Vyriad Therapeutics and Lars van der Veen, Chief Scientific Officer at iOnctura.
Presentations will cover how cancer treatments have shifted towards reprogramming the biology driving tumour growth, immune escape and treatment resistance, the trajectory that in vivo CAR-T treatments are taking, and how challenging tumours burdened by stroma and immune-mediated resistance can be tackled.
Q&A with the speakers follows the presentations.
The post New webinar: Tackling drug discovery challenges in cancer research appeared first on Drug Discovery World (DDW).
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Psilocybin proves promising in neuropathic pain mouse study
Amid the rise of psychedelics in the mental health space, researchers have begun to explore psilocybin as a treatment for chemotherapy-induced peripheral neuropathy.
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New Spectrometry Technique Could Aid Formulation Development
New Spectrometry Technique Could Aid Formulation Development
A new technique combining two forms of spectrometry could help biopharmaceutical companies improve their choice of formulation buffer for antibody manufacturing by revealing how molecular forms and three-dimensional shapes of complex biologics respond to their environment. That’s the view of Christian Bleiholder, PhD, a professor at Florida State University who helped develop the technique.
According to Bleiholder, what happens structurally when a complex biological molecule, such as an antibody or viral spike protein, binds to its target is currently poorly understood.
“This is where [this approach] can help with the bioprocessing and formulation,” he says, as structural changes “can affect the lifespan [of the product] and lead to issues, such as aggregation.”
Because antibodies are complex, existing techniques tend to be powerful at different levels of complexity, he explains. Mass spectrometry is particularly powerful for distinguishing molecular composition, while structural approaches such as X-ray crystallography and cryo-electron microscopy can provide high-resolution structural information.
The challenge is understanding the link between these things within a heterogeneous sample, he says.
To overcome this, Bleiholder and his team worked with Bruker Daltonics to develop Tandem-Trapped Ion Mobility Spectrometry (Tandem-TIMS). This combines tandem ion mobility spectrometry with tandem mass spectrometry to disentangle three overlapping layers of molecular complexity: molecular form, three-dimensional shape, and binding or assembly state, he says.
He explains that, if the proteins have different structures, they can be characterized with tandem ion mobility spectrometry, and then mass spectrometry can be used to look at their molecular forms and binding states.
Going forward, Bleiholder hopes the technique can be used for formulation development but also earlier, during drug discovery of new products, such as multi-specific antibodies, to determine which molecular states are important and how those change when a biologic engages its target. He also plans to look at automating the technique.
Bleiholder spoke about using Tandem-TIMS at the Bioprocessing Summit in Boston earlier this year.
The post New Spectrometry Technique Could Aid Formulation Development appeared first on GEN – Genetic Engineering and Biotechnology News.
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