주제분류
자료유형
등재정보
발행기관
전체 선택해제
총 6건 검색
본문검색 결과만 보기
-
Unchanged Protein Level of Ryanodine Receptor but Reduced [3H] Ryanodine Binding of Cardiac Sarcoplasmic Reticulum from Diabetic Cardiomyopathy Rats
EunHeeLee, YoungJuSeo, Young-HoonKim, HaeWonKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2001, Vol.5 No.5 5 397-405 (9 pages)
The ryanodine receptor, a Ca2 release channel of the sarcoplasmic reticulum (SR), is responsible for the rapid release of Ca2 that activates cardiac muscle contraction. In the excitation-contraction coupling cascade, activation of SR Ca2 release channel is initiated by the activity of sarcolemmal Ca2 channels, the dihydropyridine receptors. Previous study showed that the relaxation defect of diabetic heart was due to the changes of the expressional levels of SR... -
Comparison of the Determinants in the Differences in Force- Frequency Relationships between Rat and Rabbit Left Atria
ChangMannKoSoon-JinKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.5 11 417-425 (9 pages)
The underlying mechanism commonly applicable for both the positive and negative force-frequency relationships (FFR) was pursued in left atria (LA) of rat and rabbit. The species differences in the roles of Na/Ca2 exchanger and sarcoplasmic reticulum (SR), which are major intracellular Ca2 regulatory mechanisms in the heart, were examined in the amplitude accommodation to the frequency that changed from 3 Hz to the variable test frequencies for 5 minutes in the electrically... -
Relatoinship between Sarcoplasmic Reticular Calcium Release and Na+-Ca2+ Exchange in the Rat Myocardial Contraction
Eun-GiKim, SoonJinKim, ChangMannKo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 14 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2000, Vol.4 No.3 4 197-210 (14 pages)
Suppressive role of Na-Ca2 exchange in myocardial tension generation was examined in the negative frequency-force relationship (FFR) of electric field stimulated left atria (LA) from postnatal developing rat heart and in the whole-cell clamped adult rat ventricular myocytes with high concentration of intracellular Ca2 buffer (14 mM EGTA). LA twitch amplitudes, which were suppressed by cyclopiazonic acid in a postnatal age-dependent manner, elicited frequency-dependent and... -
Decrease in Ca2+ Storage in the Cardiac Sarcoplasmic Reticulum of Diabetic Rat
Won-TaeKim, HaeWonKim, Young-KeeKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1998, Vol.2 No.6 9 725-732 (8 pages)
In order to elucidate the molecular mechanism of the intracellular Ca2 overload frequently reported from diabetic heart, diabetic rats were induced by the administration of streptozotocin, the membrane vesicles of junctional SR (heavy SR, HSR) were isolated from the ventricular myocytes, and SR Ca2 uptake and SR Ca2 release were measured. The activity of SR Ca2-ATPase was 562⁑14 nmol/min/mg protein in control heart. The activity was decreased to 413⁑30... -
흰쥐 심근의 역 사다리 효과에 있어서 생후 연령에 따른 Na+-Ca2+ 교환의 역할에 관한 연구 Studies on the Roles of Na+-Ca2+ Exchange according to Postnatal Age in the Negative Staircase Effect of the Rat Heart
이해용, 김순진, 고창만, Hae-yongLee, SoonJinKimChangMannKo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 10 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.6 12 707-716 (10 pages)
Recent reports revealed that the Na-Ca2 exchangers and feet structures of sarcoplasmic reticulum(SR) are located in close vicinity in the specific compartment. Therefore, we investigated the possibility that the Na-Ca2 exchanger may decrease the tension development by transporting the Ca2 out of the cell right after it released from SR, on the basis of this anatomical proximity. We exammined the negative force-frequency relationship of the developed tension in... -
[3H]Ryanodine Binding Sites of SR Vesicles of the Chicken Pectoral Muscle
Hyo-YungYun, Jong-RyeJeon, Jang-HeeHong, Gang-MinHur, Jae-HeunLee, Jeong-HoSeok* 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 1997, Vol.1 No.4 4 377-384 (8 pages)
To investigate the properties of ryanodine binding sites of the bird skeletal SR vesicles, SDS PAGE, purification of RyR, and [3H]ryanodine binding study were carried out in the SR vesicles prepared from the chicken pectoral muscle. The chicken SR vesicles have two high molecular weight (HMW) protein bands as in eel SR vesicles on SDS PAGE. The HMW bands on SDS PAGE were found in the [3H] ryanodine peak fraction (Fr3-5) obtained from the purification step of the ryanodine receptor protein. Bmax...
