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박문권(Moon Kweon Bang),김상섭(Sahng Seop Kim),주봉덕(Bong Deok Ju),송문식(Moon Sik Song),박미자(Mee Ja Park),한균인(Kyun In Han),김주옥(Ju Ock Kim),김선영(Sun Young Kim) 대한내과학회 1989 대한내과학회지 Vol.37 No.5
N/A In 1904, Albrecht first used the term hamartoma to refer to a congenital abnormal mixing of the normal components of an organ. Hamartomas can occur in any organ. The pulmonary hamartoma is an uncommon benign tumor, which is mainly located parenchymally and rarely located Intrabronchially. Fifty eight Case of intrabronchial hamartoma and 4 cases of multiple hamartoma were reported worldwide by 1972 and 1973, respectively. Intrabronchial hamartomas, 6 cases of which were presented by Cho and 1 case of which was presented by Lee, were reported domestically, in which, however, no intrabronchial multiple hamartoma was found. Recently we experienced a case of endobronchial multiple chondroid hamartoma identified with flexible bronchoscopic biopsies, and we herein report it with a review of the literature.
전병화(Jeon, Byeong-Hwa),김상섭(Kim, Sahng-Seop),김세훈(Kim, Se-Hoon),장석종(Chang, Seok-Jong) 대한생리학회 1990 대한생리학회지 Vol.24 No.2
The contractile action of barium (Ba<sup>2+</sup>) was investigated in the arterial strip of rabbit renal artery. The helical strip of isolated renal artery was immersed in the Tris-buffered Tyrode s solution equilibrated with 100% O<sup>2</sup> at 37℃ and its isometric tension was measured. Ba<sup>2+</sup>-induced contraction of arterial strip was dose-dependent and its maximal tension corresponded to 92.1±4.5% of tension by K<sup>+</sup>(100 mM). Ba<sup>2+</sup>-induced contraction did not show the tachyphylactic phenomenon in the normal Tyrode s solution. Ba<sup>+2</sup> induced the tonic contraction in the Ca<sup>2+</sup>-free tyrode s solution and that was increased by the extracellula addition of Ca<sup>2+</sup>. During the repeated exposure of the same dose of Ba<sup>2+</sup> (10 mM) in the Ca<sup>2+</sup>-free Tyrode s solution, Ba<sup>2+</sup>-induced contraction was progressively decreased. Even though the intracellular NE-and caffeine-sensitive Ca<sup>2+</sup> was depleted, Ba<sup>+2</sup> induced the tonic contraction. After the pretreatment of lanthnum or verapamil, Ba<sup>+2</sup> did not induce contraction. Ba<sup>2+</sup>-inducedcontraction was suppressed by extracellular K<sup>+</sup> in the normal Tyrode s solution and that was dependent on K<sup>+</sup> concentration. Suppressive effect of K<sup>+</sup> (14 mM) on the Ba<sup>2+</sup>-induced contraction was also dependent on the intracellular Ca<sup>2+</sup> concentration. From the above resuts, it is suggested that Ba<sup>+2</sup> activate indirectly the contractile process by promoting the mobilization of intracellular Ca<sup>2+</sup> and the influx of extracellular Ca<sup>2+</sup>. It is also suggested that action of Ba<sup>+2</sup> on the Ca<sup>2+</sup>-activated K<sup>+</sup> channel can result in the depolarization of cell membrane in the rabbit renal artery.