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도준상(Junsang Doh) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Immune system is composed of multiple cells with distinct functions, and immune responses are orchestrated by complex and dynamic cell-cell interactions. Therefore, each cell behavior and function should be understood under right spatio-temporal context. Studying such complexity and dynamics has been challenging with conventional biological tools. Recent development of new technologies such as state of art imaging instruments and microfabrication techniques compatible with biological systems have provided many exciting opportunities to dissect complex and dynamic immune cell interactions; new microscopy techniques enable us to observe stunning dynamics of immune system in real time. Microfabrication permits us to manipulate microenvironments governing molecular/cellular dynamics of immune cells to study detailed mechanisms of phenomena observed by microscopy. Also, microfabrication can be used to engineer microenvironments optimal for specific imaging techniques. In this presentation, I am going to present an example of how these two techniques can be combined to tackle challenging problems in immunology. Obviously, this strategy can readily be applied to many different fields of biology other than immunology.
Micro/Nanotechnology for Cancer Immunotherapy
Junsang Doh(도준상) 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Cancer immunotherapy has recently been successful in the treatment of various types of tumors. Cytotoxic lymphocytes, including cytotoxic T lymphocytes (CTLs), natural killer (NK) cells, play an essential role in elimination of tumors by directly killing tumor cells. Therefore, evaluation of lymphocyte cytotoxicity against tumor cells is critical for the improvement of cancer immunotherapy. Lymphocyte cytotoxicity is a strictly regulated function requiring a multi-step “checkpoint” to minimize normal cell damage. However, current cytotoxicity assays mostly provide information about final outcomes of cytotoxicity. To overcome this limitation, we are developing new assays that allow “stepwise” evaluation of lymphocyte cytotoxicity using dynamic imaging and microfabrication techniques.
고속 이광자 현미경과 도플러 빛간섭 단층 촬영의 결합시스템을 통한 유동가시화 및 생체 이미징
정보수(Bosu Jeong),이병학(Byunghak Lee),양보기(Bo-Gie Yang),남효석(Hyo Seok Nam),윤상준(Sang June Yoon),장명호(Myoung Ho Jang),도준상(Junsang Doh),김기현(Ki Hean Kim) 한국가시화정보학회 2010 한국가시화정보학회 학술발표대회 논문집 Vol.2010 No.11
We present a combined high-speed two-photon microscopy (TPM) and Doppler optical coherence tomography (DOCT) which can provide complement information of in vivo tissues: molecular and cellular information with TPM and supracellular, tissue structure and vasculature with DOCT. This combined system can do simultaneous imaging in principle asusing separate light sources. Currently the combined system is under development, and preliminary data of individual imaging modalities are presented: fingertip and intralipid flowimaging in micro tube with DOCT, ex-vivo tissue imaging with TPM.