Tasuku Honjo
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| Tasuku Honjo | |
|---|---|
| Name | Tasuku Honjo |
| Caption | Honjo in 2018 |
| Birth date | 27 January 1942 |
| Birth place | Kyoto, Empire of Japan |
| Nationality | Japanese |
| Fields | Immunology, Molecular biology |
| Workplaces | Kyoto University, Osaka University, University of Tokyo, National Institutes of Health |
| Alma mater | Kyoto University |
| Known for | Discovery of PD-1 and its role in cancer immunotherapy |
| Awards | Nobel Prize in Physiology or Medicine (2018), Order of Culture (2018), Robert Koch Prize (2012), Imperial Prize of the Japan Academy (1996) |
Tasuku Honjo is a distinguished Japanese immunologist whose groundbreaking research fundamentally advanced the field of cancer immunotherapy. He is best known for his discovery of the immune checkpoint protein PD-1 (programmed cell death protein 1), a pivotal finding that led to the development of revolutionary cancer treatments. For this work, he was jointly awarded the Nobel Prize in Physiology or Medicine in 2018 with American immunologist James P. Allison. His career has been spent at premier institutions including Kyoto University and the University of Tokyo, where his work on adaptive immunity and antibody diversification has also been highly influential.
Early Life and Education
Born on January 27, 1942, in Kyoto, he developed an early interest in science. He pursued his undergraduate studies in medicine at the prestigious Kyoto University, graduating in 1966. He continued his medical education at the same institution, earning a Ph.D. in medical chemistry in 1975. His doctoral research was conducted under the guidance of notable biochemists, laying a foundation in molecular biology. During this formative period, he also spent time as a postdoctoral fellow in the United States at the Carnegie Institution for Science in Baltimore, further broadening his scientific perspective.
Career
His academic career began with a faculty position at the University of Tokyo in the late 1970s. He later returned to his alma mater, Kyoto University, where he served as a professor and chair of the Department of Immunology and Genomic Medicine. He also held significant positions at Osaka University and contributed to research at the National Institutes of Health. Throughout his tenure, he mentored numerous students who have become leading figures in immunology. His leadership extended to roles such as president of the Japanese Society for Immunology and dean of the Kyoto University Graduate School of Medicine, shaping the direction of immunological research in Japan.
Research and Contributions
His most celebrated contribution is the discovery and characterization of PD-1 in 1992, a protein expressed on the surface of T cells that functions as an immune checkpoint. He demonstrated that tumors exploit this pathway by expressing PD-L1 to suppress the immune system, allowing cancer to evade destruction. This foundational work directly enabled the development of PD-1 and PD-L1 inhibitor drugs, such as nivolumab and pembrolizumab, which are now standard treatments for various cancers including melanoma, lung cancer, and Hodgkin's lymphoma. Earlier in his career, he made seminal discoveries in antibody class switch recombination and the activation-induced cytidine deaminase (AID) enzyme, which are critical for adaptive immunity.
Awards and Recognition
His research has been honored with numerous international awards. The pinnacle of recognition came in 2018 when he shared the Nobel Prize in Physiology or Medicine with James P. Allison. That same year, he was bestowed the Order of Culture by the Emperor of Japan. Other major accolades include the Robert Koch Prize in 2012, the Tang Prize in Biopharmaceutical Science in 2014, and the Imperial Prize of the Japan Academy in 1996. He is also a foreign member of the United States National Academy of Sciences and has received the William B. Coley Award for distinguished research in basic and tumor immunology.
Personal Life
He is known to be a dedicated mentor and an avid reader with a deep appreciation for history and classical music. He maintains a strong connection to Kyoto, the city of his birth and academic foundation. In interviews, he has often emphasized the importance of curiosity-driven basic research, which he credits for his paradigm-shifting discoveries. Following his Nobel Prize win, he has been an active advocate for continued investment in fundamental scientific research in Japan and globally.
Category:Japanese immunologists Category:Nobel laureates in Physiology or Medicine Category:Recipients of the Order of Culture Category:Kyoto University alumni Category:1942 births Category:Living people