### Current research theme

- Mathematical modeling of tumor immune evasion
- Mathematical modeling of drug resistance in EGFR targeted TKI therapy in lung cancer
- Mathematical modeling of radiation resistance from heterogenous cancer population
- Mathematical modeling of clonal hematopoiesis

etc.

### Previous research

#### Mathematical modeling of pancreatic cancer progression ( Haeno et al. Cell 2012;
Yamamoto et al. Cancer Res 2017)

We developed a mathematical model of pancreatic cancer progression based on clinical data. The
model was validated by survival data and predicted that a tumor with over 4 cm diameter almost had
metastatic sites.

### Mathematical modeling of lower grade glioma (Aoki et al. Cancer Res 2021)

Grade II gliomas grow slowly but frequently undergo malignant transformation, which eventually leads to premature death.
Chemotherapy and radiotherapy treatments prolong survival, but can also induce genetic alterations involved in transformation . H ere,
we developed a mathematical model of tumor progression based on serial tumor volume data and treatment history of 276 gliomas .
The computational analyses showed that chemotherapy and radiotherapy significantly suppressed tumor growth but increased
malignant transformation rate per cell by 1.8 to 2.8 times compared with before treatment. This model revealed that prompt
adjuvant chemoradiotherapy prolonged malignant transformation free survival in small gliomas (≤ 50 cm3)

### Mathematical modeling of cancer immune evasion in MSI
High colorectal cancer (Kawazu et al.
Gastroenterology 2021)

We developed a mathematical model of tumor evolution under the selective pressure of immune responses. We recapture 3E
concept in tumor immune, i.e., tumor increases exponentially at first (when ), gradually slows down, then may even decrease
in number because of the immune responses, and finally increase again after the successful immune evasion. Moreover the
model predicted two distinct tumor subtypes with low or high mutations, which should have different potential against
immunotherapy.