1251
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Lee KH, Kagan AR, Nussbaum H, Wollin M, Winkley JH, Norman A. Analysis of dose, dose-rate and treatment time in the production of injuries by radium treatment for cancer of the uterine cervix. Br J Radiol 1976; 49:430-44. [PMID: 949577 DOI: 10.1259/0007-1285-49-581-430] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
A retrospective study has been made of 15 patients who had developed severe complications to the bladder, rectum and ureters after radiation therapy for carcinoma of the cervix. Comprehensive dose distribution in the pelvis were calculated with computer assistance to visualize how the normal organs had been irradiated. The risk of normal tissue injury was analysed graphically with respect to the maximum radium dose, dose-rate and irradiation time. The two groups of data representing the injured and non-injured organs separate much better in a dose-rate versus dose plot than in a conventional Strandqvist type dose-time plot. This implies that in radium therapy, the dose-rate rather than the treatment time, is the important parameter in modifying the risk of normal tissue injury. Our results show a good separation of injured from non-injured cases only when the maximum values of dose and dose-rate were used. This suggests that clinically significant injury may develop from relatively small regions of high dose and dose-rate. Since the dose-rate varies from point to point in the pelvis (unlike treatment time), comprehensive determinations of dose-rate distributions are required in order to locate the sites of potential injuries.
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1252
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Lee KH, Fu CC, Jung M. Mechanism of action of retinyl compounds on wound healing IV: effect of desmethylretinoic acid and its vinylogs on granuloma formation. J Pharm Sci 1976; 65:580-5. [PMID: 1271260 DOI: 10.1002/jps.2600650425] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The effect of side-chain length of desmethylretinoic acid on granuloma formation induced by implantation of cotton pellets was studied. As in the homologous series of retinoic acid studies, compounds with side chains shorter than retinoic acid were not active while compounds with side chains as long or longer than retinoic acid were active. The compound with a chain two carbons longer than retinoic acid was the most active. The hydroxyproline and hexosamine contents of the granuloma were analyzed. The mechanisms of action of these active compounds on wound healing are discussed.
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1253
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Warshaw AL, Bellini CA, Lee KH. Electrophoretic identification of an isoenzyme of amylase which increases in serum in liver diseases. Gastroenterology 1976; 70:572-6. [PMID: 1254141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Isoenzymes of amylase were studied in serum from 72 persons by means of polyacrylamide gel electrophoresis and a direct saccharogenic assay for amylase activity. In 37 normal individuals, there were two major peaks of amylase actvity with mobilities similar to pancreatic and salivary amylases. In 11 patiets with acute pancreatitis, the area of activity corresponding with pancreatic amylases increased disproportionately. Electrophoretic patterns of amylase activity in normal and pancreatitis urine were almost identical to the respective serum patterns from the same persons. In contrast, a prominent slower-moving peak of amylase activity occurred in the serum of 8 of 12 patients who had hyperamylasemia associated with various liver diseases. Traces of this third peak were identifiable in one-third of normal serum specimens, but no increases in its activity were observed in any specimen from 11 patients with pancreatitis or from 12 other patients with hyperamylasemia unassociated with liver disease. The slower-moving peak was absent from the urine of patients whose serum contained it. The origin of the slower-moving serum amylase appearing in patients with liver disease is not established by these studies. It is possible either that a hepatic amylase is liberated from damaged liver cells or that the metabolism of an amylase not originating in the liver is altered as a result of liver dysfunction.
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1254
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Lee KH, Kim CS, Lee KC, Kim SC, Lee HJ. Arterio-jugular oxygen difference in severe intracranial lesions. Yonsei Med J 1976; 17:15-20. [PMID: 1031499 DOI: 10.3349/ymj.1976.17.1.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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1255
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Lee KH. [Nursing affairs and national policy in public health: the educational aspect]. Taehan Kanho 1975; 14:66-7. [PMID: 1059847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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1256
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Abstract
The active principle responsible for the significant inhibitory activity against the Walker 256 carcinosarcoma (ascites) in rats, isolated from the chloroform extract of the whole plant of Elephantopus carolinianus Willd., was characterized as deoxyelephantopin, a sesquiterpene lactone.
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1257
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Abstract
Several novel steroidal alpha-methylene-gamma-lactones and related derivatives have been synthesized as potential steroid alkylating antitumor agents. The synthesis of these compounds involved the convenient Reformatsky-type reaction between ethyl-alpha-(bromomethyl)acrylate and the proper steroidal ketones. In vitro assay for the cytotoxicity of these compounds against the growth of tissue culture cells originating from human epidermoid carcinoma of the larynx (H.Ep.-2) has shown significant activity. Cytotoxicity was improved at least sixfold with the introduction of lipophilic steroidal character. Preliminary in vivo tumor assay also indicated that these compounds were active against Walker 256 carcinosarcoma in rats and were inactive against both L1210 lymphoid leukemia and Ehrlich ascites carcinoma in mice. However, the simple alpha-methylene-beta,beta-dicarbethoxy-gamma-butyrolactone significantly inhibited Ehrlich ascites tumor growth.
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1258
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Chan J, Lee KH. Effect of uridine diphospho-N-acetylglucosamine and sodium salicylate on L-glutamine-D-fructose-6-phosphate aminotransferase activity from rat gastric mucosa. J Pharm Sci 1975; 64:1182-5. [PMID: 1151680 DOI: 10.1002/jps.2600640711] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Mechanisms of inhibitory action of sodium salicylate on L-glutamine-D-fructose-6-phosphate aminotransferase, prepared from rat gastric mucosa, were studied. Sodium salicylate at lower concentrations (10-20 mM) inhibited reversibly aminotransferase activity by competing with fructose-6-phosphate. At higher concentrations, sodium salicylate inactivated the enzyme irreversibly, with an inactivation rate following first-order kinetics with respect to the enzyme concentration. Uridine-5'-diphospho-N-acetylglucosamine is an endogenous feedback inhibitor. It inhibited the aminotransferase-catalyzed reaction also by competing with fructose-6-phosphate but with an inhibiting activity 1000 times that of sodium salicylate. Uridine-5'-diphospho-N-acetylglucosamine reduced the salicylate inhibition of the enzymic reaction and protected the enzyme from salicylate-induced irreversible inactivation. At a fixed concentration of uridine-5'-diphospho-N-acetylglucosamine (7x10(-6)M), an increase of salicylate concentration produced an increase in enzyme activity as compared with the control.
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1259
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Lee KH, Ibuka T, Huang HC. Letter: Antitumor agents XIV: molephantinin, a new potent antitumor sesquiterpene lactone from Elephantopus mollis. J Pharm Sci 1975; 64:1077-8. [PMID: 1169316 DOI: 10.1002/jps.2600640656] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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1260
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Abstract
A reliable and sensitive method was used to compare the analgesic activities of salicylic acid and aspirin (acetylsalicylic acid) and several phenoxy substituted isosteric pairs. Those isosteric compounds studied did not show analgesic activity. The analgesic activity of aspirin was more than twofold greater than that of salicylic acid.
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1261
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Lee KH, Kim SH, Furukawa H, Piantadosi C. Antitumor agents. 11. Synthesis and cytotoxic activity of epoxides of helenalin related derivatives. J Med Chem 1975; 18:59-63. [PMID: 1109577 DOI: 10.1021/jm00235a013] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Several epoxides of helenalin related derivatives have been synthesized in an effort to evaluate the potential significance of the epoxycyclopentanone moiety for cytotoxic activity against the growth of tissue culture cells originating from human epidermoid carcinoma of larynx (H.Ep-2). Helenalin (1) was converted to the monoepoxy derivative 2 and the diepoxy derivative 3 by alkaline hydrogen peroxide at different temperatures. Alternative synthesis of 2 was achieved by a convenient method of protecting the alpha-methylene grouping of the gamma-lactone, i.e., epoxidation of helenalin dimethylamine adduct 4, followed by treatment of the reaction product 5 with m-chloroperbenzoic acid. 2,3-Epoxy-11,13-dihydrohelenalin (8) was prepared by direct epoxidation of 11,13-dihydrohelenalin (7). Treatment of mexicanin A (9) with m-chloroperbenzoic acid gave, in addition to the 1,2-epoxy derivative 10, 1-alpha-hydroxyhelenalin (11) which furnished an acetate (12) upon acetylation. Catalytic hydrogenation of 10 yielded the dihydroepoxide 13. Treatment of 1 or acetylhelenalin (15) with Ac2O-p-TsOH gave the same acetyl dienol acetate (14). Epoxidation of 14 with m-chloroperbenzoic acid gave 1,beta hydroxyhelenalin (19) and a mixture of monoepoxides (17 and 18) which yielded 19 and 11 upon silica gel chromatography. The results of the cytotoxicity test of the compounds studied indicate that either an alpha- or a beta-epoxycyclopentanone moiety in helenalin related derivatives contributes significantly to the cytotoxicity. Furthermore, this cytotoxicity appears to be independent of the presence or absence of an alpha-epoxy-gamma-lactonic moiety.
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1262
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1263
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Lee KH, Ibuka T, Wu RY. Letter: Beta unsubstituted cyclopentenone, a structural requirement for antimicrobial and cytotoxic activities. Chem Pharm Bull (Tokyo) 1974; 22:2206-8. [PMID: 4452214 DOI: 10.1248/cpb.22.2206] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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1264
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Abstract
Growth of three different soil isolates of Cladosporium resinae on a large number of carbon compounds was found to be inhibited by n-hexane and n-heptane whereas n-octane and all higher liquid n-alkanes had no effect on growth. In addition, n-hexane and, to a lesser extent, n-heptane caused rapid inhibition of glucose incorporation and considerable loss of potassium and protein from the cells. The phenomenon is unlikely to be due to removal of membrane lipids such as sterols and phospholipids by the n-alkanes, but rather to a limited disorganization of the cell membrane resulting in rapid loss of selective permeability.
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1265
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Lee KH, Kim SH, Piantadosi C, Huang ES, Geissman TA. Antitumor agents. 8. Synthesis and cytotoxic activity of O,O'-bis(acrylyl)-alpha,omega-alkanediols. J Pharm Sci 1974; 63:1162-3. [PMID: 4850611 DOI: 10.1002/jps.2600630734] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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1266
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Lee KH, Johnston R. Effect of below-knee bracing on knee movement: biomechanical analysis. Arch Phys Med Rehabil 1974; 55:179-82. [PMID: 4823070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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1267
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Lee KH, Blackwell R. Observations on the configuration of the fetal electrocardiogram before and during labour. J Obstet Gynaecol Br Commonw 1974; 81:61-9. [PMID: 4131861 DOI: 10.1111/j.1471-0528.1974.tb00366.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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1268
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1269
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Lee KH, Johnston R. Bracing below the knee for hemiplegia: biomechanical analysis. Arch Phys Med Rehabil 1973; 54:466-70. [PMID: 4743416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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1270
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Lee KH, Johnston R. Biomechanical comparison of 90-degree plantar-flexion stop and dorsiflexion-assist ankle braces. Arch Phys Med Rehabil 1973; 54:302-6. [PMID: 4718237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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1271
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Lee KH, Fu CC, Spencer MR, Tong TG, Poon R. Mechanism of action of retinyl compounds on wound healing. 3. Effect of retinoic acid homologs on granuloma formation. J Pharm Sci 1973; 62:895-9. [PMID: 4712619 DOI: 10.1002/jps.2600620605] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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1272
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1273
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1274
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Furukawa H, Lee KH, Shingu T, Meck R, Piantadosi C. Carolenin and carolenalin, two new guaianolides in Helenium autumnale L. from North Carolina. J Org Chem 1973; 38:1722-5. [PMID: 4709673 DOI: 10.1021/jo00949a023] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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1275
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1276
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Abstract
Four different isolates of Cladosporium resinae from Australian soils were tested for their ability to utilize liquid n-alkanes ranging from n-hexane to n-octadecane under standard conditions. The isolates were unable to make use of n-hexane, n-heptane, and n-octane for growth. In fact, these hydrocarbons, particularly n-hexane, exerted an inhibitory effect on spore germination and mycelial growth. All higher n-alkanes from n-nonane to n-octadecane were assimilated by the fungus, although only limited growth occurred on n-nonane and n-decane. The long chain n-alkanes (C(14) to C(18)) supported good growth of all isolates, but there was no obvious correlation between cell yields and chain lengths of these n-alkanes. Variation in growth responses to individual n-alkane among the different isolates was also observed. The cause of this variation is unknown.
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1277
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Lee KH, Meck R, Piantadosi C, Huang ES. Antitumor agents. 4. Cytotoxicity and in vitro activity of helenalin esters and related derivatives. J Med Chem 1973; 16:299-301. [PMID: 4733115 DOI: 10.1021/jm00261a034] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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1278
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1279
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1280
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Abstract
The foetal pH values of eighty-eight cases delivered within 30 min after foetal blood sampling were correlated with the 1-min Apgar score. With a pH of 7·20 or above the error of prediction was 1·3%. The error in cases with pH below 7·20 was 54·5%. Significantly higher pH and lower δ base deficit were present in the low foetal pH group in vigorous, as opposed to depressed infants, suggesting that infusion acidosis was present in infants with a high Apgar score. The degree of correlation between the foetal pH and the Apgar score was not significantly influenced by shortening the sampling-delivery interval to 15 min or lengthening it to 3 hr. The most significant factor affecting the degree of correlation in the present study was the setting of the critical pH. If the criterion of the critical pH was taken as 7·13 there would have been no false positive results and the error of prediction in cases delivered within 30 min of foetal blood sampling would be reduced to 1·1%.
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1281
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1282
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Shon DS, Yoon BE, Lee KH. [Dimensional changes of upper dental arch during anterior tooth eruption]. Taehan Chikkwa Uisa Hyophoe Chi 1972; 10:273-6. [PMID: 4505055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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1283
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Lee KH, Huang HC, Huang ES, Furukawa H. Antitumor agents. II. Eupatolide, a new cytotoxic principle from Eupatorium formosanum HAY. J Pharm Sci 1972; 61:629-31. [PMID: 4335375 DOI: 10.1002/jps.2600610432] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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1284
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Lee KH, Anuforo DC, Huang ES, Piantadosi C. Antitumor agents. I. Augustibalin, a new cytotoxic sesquiterpene lactone from Balduina angustifolia (Pursh.) Robins. J Pharm Sci 1972; 61:626-8. [PMID: 4335374 DOI: 10.1002/jps.2600610431] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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1285
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Abstract
The acid-base balance in 307 Chinese patients in labour was studied in Tsan Yuk Hospital, Hong Kong over a 15-month period. Fifty-six of these were normal cases, 200 cases exhibited clinical signs of foetal distress and the other fifty-one were high risk cases. The results showed that cases of clinical foetal distress had a significantly lower foetal pH than that in the normal control group. Of the different signs of clinical foetal distress, meconium was the least important and foetal tachycardia appeared to be more significant than the others. Cases of postmaturity and uterine inertia also gave a lower foetal pH than normal. It is concluded that foetal blood sampling is indicated in these types of cases.
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1286
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1287
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1288
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Lee KH, Huang ES, Piantadosi C, Pagano JS, Geissman TA. Cytotoxicity of sesquiterpene lactones. Cancer Res 1971; 31:1649-54. [PMID: 4330633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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1289
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1290
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Yeung CY, Tam LS, Chan A, Lee KH. Phenobarbitone prophylaxis for neonatal hyperbilirubinemia. Pediatrics 1971; 48:372-6. [PMID: 5094338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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1291
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1292
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1293
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1294
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1295
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Lee KH. Vacuum extraction after fetal blood sampling. Aust N Z J Obstet Gynaecol 1970; 10:205-6. [PMID: 5275569 DOI: 10.1111/j.1479-828x.1970.tb00430.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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1296
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Chen CH, Soine TO, Lee KH. Total synthesis of (plus or minus)-bisnorargemonine. J Pharm Sci 1970; 59:1529-30. [PMID: 5471972 DOI: 10.1002/jps.2600591044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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1297
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Lee KH, Tong TG. Mechanism of action of retinyl compounds on wound healing. II. Effect of active retinyl derivatives on granuloma formation. J Pharm Sci 1970; 59:1195-7. [PMID: 5457346 DOI: 10.1002/jps.2600590836] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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1298
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Lee KH, Tong TG. Mechanism of action of salicylates. 8. Effect of topical application of retinoic acid on wound-healing retardation action of a few anti-inflammatory agents. J Pharm Sci 1970; 59:1036-8. [PMID: 5428078 DOI: 10.1002/jps.2600590731] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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1299
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Lee KH. [Formation of a Korean Nursing Institute. An inaugural address]. Taehan Kanho 1970; 9:11-2. [PMID: 5270065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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1300
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