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Unmet Clinical Needs in the Treatment of Patients with Thyroid Cancer
김원배,전민지,김원구,김태용,송영기,김원배 대한내분비학회 2020 Endocrinology and metabolism Vol.35 No.1
The increased incidence of thyroid cancer is a worldwide phenomenon; however, the issue of overdiagnosis has been most prominent in South Korea. The age-standardized mortality rate of thyroid cancer in Korea steeply increased from 1985 to 2004 (from 0.17per 100,000 to 0.85 per 100,000), and then decreased until 2015 to 0.42 per 100,000, suggesting that early detection reduced mortality. However, early detection of thyroid cancer may be cost-ineffective, considering its very high prevalence and indolent course. Therefore, risk stratification and tailored management are vitally important, but many prognostic markers can only be evaluatedpostoperatively. Discovery of preoperative marker(s), especially for small cancers, is the most important unmet clinical need for thyroid cancer. Herein, we discuss some such factors that we recently discovered. Another unmet clinical need is better treatment of radioiodine-refractory (RAIR) differentiated thyroid cancer (DTC) and undifferentiated cancers. Although sorafenib and lenvatinib areavailable, better drugs are needed. We found that phosphoglycerate dehydrogenase, a critical enzyme for serine biosynthesis, couldbe a novel therapeutic target, and that the lymphocyte-to-monocyte ratio is a prognostic marker of survival in patients with anaplasticthyroid carcinoma or RAIR DTC. Deeper insights are needed into tumor-host interactions in thyroid cancer to improve treatment.
DCP가교 Trans-polyoctenamer의 기초적 특성 -범용주파수 및 저주파수영역에서의 동력학적 및 기계적 성질-
김원배,임승순 한국섬유공학회 1987 한국섬유공학회지 Vol.24 No.2
The low frequency (10-2 to 1 Hz) dynamic mechanical properties were obtained over the temperature range of 55 to 150$^{\circ}C$ for trans-polyoctenamer networks prepared in the presences of 1, 1.5, and 2 parts dicumylperoxide. And also dynamic mechanical properties were obtained over the temperature range of -100 to 40$^{\circ}C$ for DCP crosslinked TOR. Incorporation of dicumylperoxide (DCP) with Trans-polyoctenamer(TOR) decreases the storage modulus and increases the mechanical loss(tan$\delta$). Glass transition temperature (Tg) is increased about 7$^{\circ}C$ for tenfold increase in frequency (11Hz-11OHz). The shift of Tg to higher temperature with increasing frequency has been occured in accordance with the time-temperature superposition. In dynamic mechanical properties of low frequency range, storage modulus is less sensitive for variation of frequency at higher crosslinking density. Activation energy and constant C1, C2 of W.L.F. eg. are increased by the increment of D.C.P. content in crosslinked TOR. But the values of C1, C2 are too large unusually. Thus, it is concluded that Arrehenius eq. is rather fitted than W.L.F. eq. for crosslinked TOR.
김원배,이철태,유영홍,박용성 한국화학공학회 1985 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.23 No.6
원소상 황의 새로운 황화제로서의 사용가능성을 조사하고자 탄소존재하에서 원소상 황과 함티탄자철광의 반응을 시도하였다. 반응변수로서는 황분압, 반응온도, 함티탄자철광에 대한 탄소첨가량의 무게비, 반응시간, 함티탄자철광의 입도등이 선정되었으며 검토결과 본 황화반응의 적정 조건은 황분압 0.2atm., 반응온도 800℃, 함티탄자철광에 대한 첨가탄소량의 무게비 0.7, 반응시간 90분, 함티탄자철광의 입도 0-150mesh였다. 위 조건에서 얻엉진 황화반응생성물을 1M HCl로 침출한 후 얻은 잔사의 TiO₂ 함량은 78.48%였다. The reactions in the carbon-elemental sulfur-titaniferous magnetite system were investigated in order to find the possibility of elemental sulfur being an alternative sulfidization agent. The study of this reaction included reaction variables such as partial ptessure of sulfur, reaction temperature, weight ratio of added carbon to titaniferous magnetite, reaction time, and particle size of titaniferous magnetite. The proper conditions for this sulfidization were that partial pressure of sulfur 0.2 atm., reaction temperature 800℃, weight ratio of added carbon to titaniferous magnetite 0.7, reaction time 90min., and particle size of titaniferous magnetite under 150 mesh. The content of TiO₂ of residue obtained by leaching the sulfidized product with 1M HCl was 78.48%.