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Reading: Medication increases radiation therapy’s efficacy for lung cancer that has progressed to brain – World News Network
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Latest World News Update > Blog > Science > Medication increases radiation therapy’s efficacy for lung cancer that has progressed to brain – World News Network
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Medication increases radiation therapy’s efficacy for lung cancer that has progressed to brain – World News Network

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Last updated: October 5, 2024 12:00 am
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Washington [US], October 5 (ANI): A group of researchers from the University of Cincinnati has discovered a possible novel approach to enhance the efficacy of radiation therapy and enhance the prognosis of patients with lung cancer metastasizing to the brain.
The research, which was headed by Debanjan Bhattacharya, PhD, as the lead author, was just released in the journal Cancers.
Lung cancer accounts for approximately one in five cancer deaths in the United States, making it the primary cause of cancer death, according to the American Cancer Society. About 80 per cent to 85 per cent of all instances of lung cancer are non-small cell lung cancer (NSCLC), which is the most common kind of the disease.
Up to 40 per cent of lung cancer patients develop brain metastases during the course of the disease, and these patients on average survive between eight and 10 months following diagnosis.
Current standard of care treatments for lung cancer that spreads to the brain include surgical resection and stereotactic brain radiosurgery, and whole brain irradiation is standard in patients with more than 10 metastatic brain lesions.
“Lung cancer brain metastasis is usually incurable, and whole brain radiation treatment is palliative, as radiation limits therapy due to toxicity,” said Bhattacharya, research instructor in the Department of Neurology and Rehabilitation Medicine in UC’s College of Medicine. “Managing potential side effects and overcoming resistance to radiation are major challenges when treating brain metastases from lung cancer. This highlights the importance of new treatments which are less toxic and can improve the efficacy of radiation therapy, are less expensive, and can improve the quality of life in patients.”
Bhattacharya and his colleagues at UC focused on AM-101, a synthetic analog in the class of benzodiazepine drugs first developed by James Cook, a medicinal chemist at the University of Wisconsin-Milwaukee. Prior to this study, AM-101’s effect in non-small cell lung cancer was unknown.
AM-101 is a particularly useful drug in the context of brain metastases in NSCLC, Bhattacharya said, as benzodiazepines are known to be able to pass through the blood-brain barrier that protects the brain from potential harmful invaders that can also block some drugs from reaching their target in the brain.
The team found AM-101 activated GABA(A) receptors located in the NSCLC cells and lung cancer brain metastatic cells. This activation triggers the “self-eating” process of autophagy where the cell recycles and degrades unwanted cellular parts.
Specifically, the study showed that activating GABA(A) receptors increases the expression and clustering of GABARAP and Nix (an autophagy receptor), which boosts the autophagy process in lung cancer cells. This enhanced “self-eating” process of autophagy makes lung cancer cells more sensitive to radiation treatment.
Using animal models of lung cancer brain metastases, the team found AM-101 makes radiation treatment more effective and significantly improves survival. Additionally, the drug was found to slow down the growth of the primary NSCLC cells and brain metastases.
In addition to making radiation more effective, adding AM-101 to radiation treatments could allow for lower radiation doses, which could reduce side effects and toxicity for patients, Bhattacharya said. The team is now working toward opening Phase 1 clinical trials testing the combination of AM-101 and radiation both in lung cancer within the lungs and lung cancer that has spread to the brain.
Bhattacharya began this research while working in the lab of former UC researchers Soma Sengupta and Daniel Pomeranz Krummel, who are now at the University of North Carolina at Chapel Hill. Bhattacharya credits their mentorship and the collaboration with other experts within UC and across multiple academic research institutions in the United States.
Bhattacharya also emphasizes the role of shared university research resources that helped the study move forward. He dedicates this work to his father, who died in 2021 while he was in the early phases of the research.
“The entire work, along with revision experiments, was done at the University of Cincinnati, and this reflects the strong collaborative effort between multiple teams. I am grateful to the Department of Neurology and Rehabilitation Medicine for the overall support in completion of this study,” he said. “My father’s passing motivated me to work harder to complete this project, as he had known about my research and wanted to see me succeed.” (ANI)


Disclaimer: This story is auto-generated from a syndicated feed of ANI; only the image & headline may have been reworked by News Services Division of World News Network Inc Ltd and Palghar News and Pune News and World News

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