About BNCT
A Novel Radiation Therapy That Selectively Targets Cancer Cells
Boron Neutron Capture Therapy (BNCT) is an innovative form of radiation therapy designed to destroy cancer cells while minimizing damage to surrounding healthy tissue.
The treatment is based on a unique property of the boron isotope boron-10 (^10B). When boron-10 captures a neutron, it undergoes a nuclear reaction that produces high-energy particles (an alpha particle and a lithium nucleus). These particles travel less than 10 μm—approximately the diameter of a single cell—allowing their destructive effects to remain almost entirely within the cell containing the boron.
The treatment is based on a unique property of the boron isotope boron-10 (^10B). When boron-10 captures a neutron, it undergoes a nuclear reaction that produces high-energy particles (an alpha particle and a lithium nucleus). These particles travel less than 10 μm—approximately the diameter of a single cell—allowing their destructive effects to remain almost entirely within the cell containing the boron.
If a boron-containing drug can selectively accumulate in cancer cells, subsequent neutron irradiation causes this reaction to occur only inside those cells. As a result, only the boron-containing cancer cells are destroyed, while neighboring healthy cells receive minimal damage. This highly selective mechanism forms the basis of Boron Neutron Capture Therapy (BNCT).
A simple way to understand BNCT is to think of it as a treatment that combines a drug and radiation. Neither the boron drug nor the neutron beam alone is sufficient to destroy cancer cells. Only when the two meet inside a boron-loaded cancer cell is a powerful cell-killing reaction triggered.
Like conventional radiotherapy, BNCT aims to target tumors. However, unlike conventional radiation, the therapeutic reaction occurs inside individual cancer cells rather than along the path of the radiation beam. This unique characteristic enables BNCT to selectively eliminate cancer cells while reducing damage to surrounding normal tissues. Consequently, BNCT is expected to offer new treatment opportunities for patients with inoperable tumors, recurrent cancers, and other difficult-to-treat malignancies.
Successful BNCT, however, depends on several critical factors. Researchers must determine whether sufficient boron accumulates in tumor cells, how much boron is taken up by normal tissues, and whether an adequate neutron dose can be delivered safely to the target. Careful pre-treatment evaluation, imaging, treatment planning, and dose calculation are therefore essential for achieving both safety and therapeutic efficacy.
BNCT is therefore much more than a specialized form of radiation therapy. It is a precision medicine approach that integrates drug development, molecular imaging, medical physics, radiation biology, and clinical oncology to optimize treatment for each individual patient.
At the Fujita Health University BNCT Research Center, we are working to advance BNCT into a safer, more effective treatment capable of reaching deep-seated tumors, thereby expanding its potential to benefit patients with cancers that remain difficult to treat today.
A simple way to understand BNCT is to think of it as a treatment that combines a drug and radiation. Neither the boron drug nor the neutron beam alone is sufficient to destroy cancer cells. Only when the two meet inside a boron-loaded cancer cell is a powerful cell-killing reaction triggered.
Like conventional radiotherapy, BNCT aims to target tumors. However, unlike conventional radiation, the therapeutic reaction occurs inside individual cancer cells rather than along the path of the radiation beam. This unique characteristic enables BNCT to selectively eliminate cancer cells while reducing damage to surrounding normal tissues. Consequently, BNCT is expected to offer new treatment opportunities for patients with inoperable tumors, recurrent cancers, and other difficult-to-treat malignancies.
Successful BNCT, however, depends on several critical factors. Researchers must determine whether sufficient boron accumulates in tumor cells, how much boron is taken up by normal tissues, and whether an adequate neutron dose can be delivered safely to the target. Careful pre-treatment evaluation, imaging, treatment planning, and dose calculation are therefore essential for achieving both safety and therapeutic efficacy.
BNCT is therefore much more than a specialized form of radiation therapy. It is a precision medicine approach that integrates drug development, molecular imaging, medical physics, radiation biology, and clinical oncology to optimize treatment for each individual patient.
At the Fujita Health University BNCT Research Center, we are working to advance BNCT into a safer, more effective treatment capable of reaching deep-seated tumors, thereby expanding its potential to benefit patients with cancers that remain difficult to treat today.