Glutathione(GSH) has a very important role in detoxification of cells and is closely related to antitumor drug-resistance of cancer cells. In order to evaluate the importance of glutathione metabolism in the drug-resistant cancer cells, the concentration of celluar GSH and activities of y-glutamylcysteine synthetase(GCS), y-glutamyl transpeptidase (GGT) and glutathione S-transferases(GST) in the adriamycin, vincristine, or cisplatin resistant L1210 (L1210AdR; L1210VcR, or L12100s) sublines were measured. Expression and amplification of GCS, GGT, and GST-i7 genes were also observed in the parent L1210 and the drug-resistant L1210 sublines. The concentration of GSH was increased 5.34 fold in L12100s, 2.83 fold in L1210VcR, and 1.78 fo-d in L1210AdR, compared to L1210. The activities of GCS and GGT were -increased in drug-resistant L1210 sublines. The GST activity was increased in L1210VcR and L1210Cis but decreased in L1210AdR compared to L1210. Expression of GCS, GGT, and GST-rr genes were increased in the resistant L1210 sublines compare to the parent L1210 in northern blot analyses. Overexpression of GCS, GGT, and GST-77 were observed in the resistant sublines, and the increases of the concentration of glutathione and the activities of GCS and GGT in the resistant sublines may be involved in a part of the drug-resistance in the resistant sublines.
Blotting, Northern ; Cisplatin ; Doxorubicin ; Drug Resistance ; Glutathione* ; Humans ; Metabolism* ; Parents ; Vincristine

No abstract available.

PURPOSE: To evaluate dysphagia objectively and quantitatively, and ta clarify the effect of neck position and viscosity changes in patients with aspiration and laryngeal penetration. MATERIALS AND METHODS: We studied 35 patients with dysphagia and 21 normal controls using videofluoroscopy and scintigraphy. Videofluoroscopy was performed with barium with three different viscosity, and scintigraphy was done, with water, yogurt, and steamed egg mixed with Tc-99m tin colloid. 1f aspiration was found during videofluoroscopic examination, patients neck position was changed and study repeated. Videofluoroscopy was analyzed qualitatively. We calculated 7 quantitative parameters from scintigraphy. According to the videofluoroscopic findings, we divided patients into 3 subgroups; aspiration, laryngeal penetration, and no-aspiration group. RESULTS: The result of videofluoroscopy revealed that the most cornmon finding was the delay in triggering pharyngeal swallow. Pharyrigeal transit time (PTT) and pharyngeal swallowing efficiency(PSE) in patients with aspiration were significantly different from other groups. After neck position change, aspiration could be reduced in all of 7 patients, and laryngeal penetration reduced hy about 82%. PTT ancl PSE were also improved after position change. Aspiration and laryngeal penetration occurred more frequently in thin liquid swallowing than in thick liquid and solid swallowing. CONCLUSION: PTT and PSE were useful for the evaluation of dysphagia. Aspiration and laryngeal penetration could be reduced when appropriate position assumed, We could decrease the chance of aspiration by changing the patient diet consisIency. Scintigraphy might be useful tool to quantitate and follow up these changes.
Barium ; Colloids ; Deglutition ; Deglutition Disorders* ; Diet ; Evaluation Studies as Topic* ; Follow-Up Studies ; Humans ; Neck ; Ovum ; Radionuclide Imaging* ; Steam ; Tin ; Viscosity ; Water ; Yogurt

We reviewed 23 patients of injury to the spine who were under 15 years of age and treated at Wonju Christian Hospital from January, 1978 to December, 1987. The patients were classified into 3 different categories, that were frsctures(17 cases), dislocations(3cases), and fracture-dislocation(3 cases). We analyzed the cause of injury, sexage distribution, treatment and neurological injuries. The results were as follows : l. Among the 23 cases, there were 16 boys(70%) and 7 girls(30%). The mean age was 11 years of age, and ages of active period, that is 10 to 15 years of age, were most common, 17 cases(74%). 2. The most common cause of injury was fall from a height, 13 cases(57%). The most common location of injury was cervicsl spine, 10 cases(43%) and among these cases, injury to upper cervical portion(C1–C3) was more common than lower cervical portion(C4–C7). 3. The cases of multiple compression fracture were 6 patients(26%), and all cases were located thoracic or thoraclumbar junction. 4. Most cases were stable spinal injury, 18 cases(78%), and the most common mechanism of injury were compreesion injuries due to hyperflexion, 15 cases(65%). 5. The most common associated injury was head injury, 9 cases(39%), and associated neurological complications were in 4 cases, 3 cases of these were recovered. We could ascertain that the prognosis of children spinal cord injury is better than that of adult. 6. Restoration of the height of the involved vertebral bocy occurred in all but one compression fractures of vertebral body. 7. There were 3 cases of epiphyseal injury, 2 of these were epiphyseal separations of odotoid process of atlas, the other was fracture of lumbar vertebral apphysis. 8. All but two were treated conservatively and the results were good. In stable spinal injury, we considerded that the duration of treatment was 4 to 6 weeks.
Adult ; Child ; Clinical Study ; Craniocerebral Trauma ; Fractures, Compression ; Gangwon-do ; Humans ; Prognosis ; Spinal Cord Injuries ; Spinal Injuries ; Spine

To assess the efficacy of 2 different mitral balloon valvotomy (PMV) techniques, PMV was performed using Inoue balloon (I) in 35 pts and double balloon (D) in 33 pts with mitral stenosis (male 27, female 41, mean age 42+/-12 years). The success rate of PMV was 89%(31/35 pts) in I group and 97%(33/33 pts) in D group. Mitral valve area after dilation increased equally effectively in both groups (I and D) from 0.9+/-0.2 and 0.8+/-0.2 to 1.9+/-0.2 and 1.9+/-0.3cm2 respectively (p<0.0001). There were no differences in degree of improvement of cardiac output, mitral gradient, left atrial pressure, pulmonary artery pressure and various doppler echocardiographic findings in both groups, but EF slope was more improved from 13+/-7 to 48+/-16 mm/sec in D group than those (from 15+/-6 to 39+/-15mm/sec) of I group. Increments of long and short diameters of mitral valve orifice by 2D-echocardiogram were 1.1+/-0.6 and 0.3+/-0.3cm in D group and 0.9+/-0.5, 0.4+/-0.3cm in I group. The ratio of long and short diameter increase was significantly larger in D than that of I group (long/short 2.8+/-0.7 vs 2.4+/-0.7, p<0.05) and short diameter of orifice after dilation was more improved in I than that of D group (1.1+/-0.2 vs 1.0+/-0.2cm p<0.05). Complications included deflation failure of Inoue balloon in 2, and cerebral embolic episode in 1 (D). Incidence of increased mitral regurgitation was 50% in D and 45% in I, development of ASD (Qp/Qs>1.2) was 20% in D, 13% in I group respectively and mean amount of left to right shunt (Qp/Qs) was 1.7+/-0.3 in D and 1.5+/-0.1 in I group. Total procedure and fluoroscopic time were 84+/-24 and 25+/-11 min. in D and 56+/-20 and 16+/-6 min. In I, which had statistically significant differences (p<0.002). Thus we concluded PMV using Inoue or double balloons was equally effective in selected patients. Total procedure and fluoroscopic time of Inoue balloon technique were significantly shorter than those of double balloons. Double balloon technique had more tendency of longitudinal splitting of the commissures.
Atrial Pressure ; Balloon Valvuloplasty* ; Cardiac Output ; Echocardiography ; Female ; Follow-Up Studies* ; Humans ; Incidence ; Mitral Valve ; Mitral Valve Insufficiency ; Mitral Valve Stenosis ; Pulmonary Artery

Percutenous transluminal coronary angioplasty(PTCA) for total coronary occlusion was performed in 20 patients(mean age 51+11years, male 16, female 4) including 12 patients with recent myocardial infaction. Primary success rate of procedure was 71%(15 out of 21 lesions). The success rate with occlusion<3 months duration was 11 out of 13(85%) lesions vs 4 out of 8(50%) with occlusion>3 months duration(P=NS). There was no difference in success rate according to vessel dilated(left anterior descending and intermediate branch 70%, right coronary artery 83%, left circumflex 67%). All patients had well developled(>grade 2 in 15 patients) collateral flow to the occluded vessel. The leng of occluded lesion more than 1.5cm was in 4 out of 21, and 3 of them had procedural failure because of inability to cross with a guide wire. Six procedsural failures included inability to cross the lesion with a guide wire in 5 and one in inability to dilate the lesion due to recoiling. Complications included intimal dissection in 3(1.5%), prolonged chest pain in 1 1 and one death due to cardiogenic shock. Although the primary success rate is relatively lower than that associated with conventional stenotic lesions, coronary angioplasty could be performed safely and successfully in the majority of patients with coronary occlusion.
Angioplasty* ; Chest Pain ; Coronary Occlusion ; Coronary Vessels* ; Female ; Humans ; Male ; Shock, Cardiogenic

Recent studies suggest that coronary endothelial dysfunction in atherosclerosis may contribute to the predisposition both for coronary spasm as well as for thrombus formation. The integrity of at least one aspect of endothelial function can be assessed by the intracoronary administration of acetylcholine. Eleven(13.4%, mean age 48+13, male 11) out of 82 consecutive patients with acute myocardial infarction showed angiographically normal or near normal coronary arteries at 7~10 in-hospital days. Ten(91%) had history of heavy smoking and 7 patients(64%) had no history of previous angina. Anterior myocardial infarction was in 8 and inferior in 3 patients. After intracoronary administration of acetylcholine(incremental dose of 20, 50ug for the right and 20, 50, 100ug for the left), 9(82) of 11 infarct related arteries showed total or subtotal occlusion, but only in 3(17%) out of 18 non-infarct related arteries of 10 patients. Multivessel spasm was noticed in 3. Ergonovine test(graded doses of 0.05, 0.1 and 0.2 mg intravenously) was performed 30 minutes after completion of acetylcholine test in 5 patients. In 1 patients, acetylcholine test was positive and but ergonovine test was negative. Conclusion : 1) Eleven(13.4%) out of 82 patients with acute myocardial infarction had angiographically normal coronary arteries. 2) Ach positive responses of infarct-related arteries are more frequent(82%) than that of non-infarct related arteries(17%), suggesting that the infarction might be related to coronary artery spasm. 3) Positive Ach responses of non-infarct related arteries occurred in 30% of Patients. 4) Ach and Erg induced vasospasm developed at the same site in 5, which suggests that local hyperreactivity might be related to spasm.
Acetylcholine* ; Arteries ; Atherosclerosis ; Coronary Vessels* ; Ergonovine ; Humans ; Infarction ; Male ; Myocardial Infarction* ; Smoke ; Smoking ; Spasm* ; Thrombosis

Intracoronary acetylcholine and intravenous ergonovine tests have been used to induce coronary artery spasm. To evaluate the usefulness of these provocative tests, acetylcholine and ergonovine tests were performed in 86 patients with normal or near normal coronary angiograms(clinically variant angina in 30, effort angina in 6, unstable angina in 5, myocardial infarction in 6, atypical chest pain in 39 patients). Acetylcholine was injected into each coronary artery in incremental doses (0.02, 0.05 and 0.1 mg into left coronary artery, 0.02 and 0.05 mg into right coronary artery) and ergonovin was given intravenously in graded doses of 0.05, 0.1 and 0.2 mg after completion of acetylcholine test. The results were as follow : 1) Among 86 patients, both acetylcholine and ergonovine tests were positive in 29 patients, both tests were negative in 50 patients, and acetylcholine test was positive but ergonovine test was negative in 7 patients ; The responses of acetylcholine and ergonovine tests were concordant in 92% of patients. The sensitvity and specificity of the acetylcholine test with reference to ergonovine test were 100% and 88% respectively. 2) In 7 patients(8%) acetylcholine test was positive but ergonovine test was negative, and this group may represent a spectrum of coronary spasm syndrome. CONCLUSION: Acetylcholine test is a safe and useful provocative test for coronary artery spasm, especially in the multivessel spasm.
Acetylcholine* ; Angina, Unstable ; Chest Pain* ; Coronary Vessels ; Ergonovine* ; Humans ; Myocardial Infarction ; Sensitivity and Specificity ; Spasm ; Thorax*

Intracoronary acetylcholine and intravenous ergonovine tests have been used to induce coronary artery spasm. To evaluate the usefulness of these provocative tests, acetylcholine and ergonovine tests were performed in 86 patients with normal or near normal coronary angiograms(clinically variant angina in 30, effort angina in 6, unstable angina in 5, myocardial infarction in 6, atypical chest pain in 39 patients). Acetylcholine was injected into each coronary artery in incremental doses (0.02, 0.05 and 0.1 mg into left coronary artery, 0.02 and 0.05 mg into right coronary artery) and ergonovin was given intravenously in graded doses of 0.05, 0.1 and 0.2 mg after completion of acetylcholine test. The results were as follow : 1) Among 86 patients, both acetylcholine and ergonovine tests were positive in 29 patients, both tests were negative in 50 patients, and acetylcholine test was positive but ergonovine test was negative in 7 patients ; The responses of acetylcholine and ergonovine tests were concordant in 92% of patients. The sensitvity and specificity of the acetylcholine test with reference to ergonovine test were 100% and 88% respectively. 2) In 7 patients(8%) acetylcholine test was positive but ergonovine test was negative, and this group may represent a spectrum of coronary spasm syndrome. CONCLUSION: Acetylcholine test is a safe and useful provocative test for coronary artery spasm, especially in the multivessel spasm.
Acetylcholine* ; Angina, Unstable ; Chest Pain* ; Coronary Vessels ; Ergonovine* ; Humans ; Myocardial Infarction ; Sensitivity and Specificity ; Spasm ; Thorax*

To assess the likelihood of procedural success in patients with multivessel coronary artery disease, 46 consecutive patients (male 34, female 12, mean age 60+/-9 years) umderwent single or multiple site angioplasty. The clinical diagnosis of unstable angina was in 20(44%), stable angina in 10 and acute or old myocardial infarction in 16. Coronary angiographic findings of 2 vessel disease was in 38(83%), triple vessel disease in 8. Left ventricular function was generally well preserved (mean ejection fraction 65+/-12%, range 30-82%) and mean 2.0 stenosis per patient angic, lasty had attempted. Single vessel angioplasty (SVA) was performed in 13 and multivessel angioplasty (MVA) in 33. Procedural success was achieved in 79(86%) out of total 92 stenoses. Sixty-six(88%) out of 75 stenoses in MVA and 13(76%) out of 17 stenoses in SVA had procedural success respectively. According to angiographic morphology of lesions, procedural success of type A stenoses was 17/17(100%), type B stenoses 57/66(86%) and type C stenoses was 5/9(33%). In 13 failures included inability to pass the guide wire cross the lesion in 7, inability to guide the griding catheter in 2 and inability to dilate lesions in 4. Before and after angioplasty, treadmill test (modified Bruce protocol)could be performed in 29 patients. Total duration of exercise and maximal double product improved significantly from 8.5+/-2.3 minute 5188+/-2403 to 12.2+1.3 min., 23,062+/-4111 respectively (p<0.001). 17 out of 24 patients who had positive treadmill test before angioplasty showed negative conversion after procedure. Complications included dissection in 29, prolongd chest pain in 5, acute closure in 3, cardiac tamponade in 1 and ventricular fibrillation due to side branch oclusion in 1. Thus, coronary angioplasty in selected paients with multivessel coronary artery disease might be useful and have relatively good immediate results, but the long-term efficacies with other forms of treatment must be evaluated prospectively.
Angina, Stable ; Angina, Unstable ; Angioplasty* ; Cardiac Tamponade ; Catheters ; Chest Pain ; Constriction, Pathologic ; Coronary Artery Disease* ; Coronary Vessels* ; Diagnosis ; Exercise Test ; Female ; Humans ; Myocardial Infarction ; Ventricular Fibrillation ; Ventricular Function, Left