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배정원,Hye Yoon Lee,김훈엽,Eun Sook Lee,배정원 한국유방암학회 2011 Journal of breast cancer Vol.14 No.4
Cyclophosphamide is commonly used in the treatment of malignant diseases. Symptomatic severe hyponatremia induced by low-dose cyclophosphamide is very uncommon worldwide. Recently we experienced a case of a 56-year-old woman with breast cancer who developed severe hyponatremia with generalized seizure after the first cycle of adjuvant chemotherapy with doxorubicin and cyclophosphamide. Her laboratory test showed a serum sodium of 116 mmol/L. Her hyponatremia was initially treated with hypertonic saline solution and furosemide. She completely recovered without neurological deficits after slow correction of the serum sodium concentration over two days. Clinicians must always keep in mind that life-threatening acute hyponatremia can be induced by intravenous cyclophosphamide during chemotherapy, even if the dosage is low.
위 윤상근 세포의 Ca^2+-의존성 K^+-전류에 미치는 Ascorbate의 효과
배정원,이무열,방효원,엄대용,이상돈 중앙대학교 의과대학 의과학연구소 1991 中央醫大誌 Vol.16 No.2
In order to observe the effect of ascorbate on the Ca^2+-activated K^+ current in pyloric circular muscle cells which plays a critical role in generation and maintenance of repolarization and automatism, apart of pyloric circular muscle tissue was excised out, digested in collagenase containing Ca^2+-free physiological solution to get single circular muscle cells and the whole cell mode of patch-clamp experiment was conducted. Following results were obtained : 1. Oscillatory outward current was reduced by ascorbate in case of high intrapipette Ca^2+ concentration in whole voltage range and was enhanced in case of low intrapipette Ca^2+ concentration. 2. Oscillatory outward current was reduced in Ca^2+-free physiological solution with calcium channel blocker and not effected by ascorbate. 3. There were no qualitative differences among the control and ascorbate-treated group in effects of pH, steady state inactivation and the remaining component of the outward current. The above results could be concluded that ascorbate effects calcium-dependent component of the oscillatory outward current in the pyloric circular smooth muscle cells.