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Park KS, Kim SH, Park JH, Han MC, Kim DY, Kim SJ. Methods for mitigating soft-tissue injury after subcutaneous injection of water soluble contrast media. Invest Radiol 1993; 28:332-4. [PMID: 8478174 DOI: 10.1097/00004424-199304000-00014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
RATIONALE AND OBJECTIVES Water soluble contrast media may cause tissue injury by extravasation during intravenous injection during various radiologic examinations. The authors attempted to find out what kind of management could mitigate tissue injury when extravasation of water soluble contrast media occurs. METHODS Sodium and meglumine ioxithalamate was injected subcutaneously into 240 hind feet of 120 rats that were divided into six groups according to the methods of experimental management. Experimental managements included the following: no further management (control), injection of distilled water, injection of normal saline, injection of hydrocortisone, hot water application, and cold water application. Gross morphologic changes in each group were compared with those in the control group. RESULTS Only the saline injection group showed statistically significant decrease of tissue injury compared with the control group. CONCLUSIONS Saline injection lessens the degree of soft-tissue injury at contrast media extravasation sites in rats.
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Park KS, Choi SY, Park MH, Tokunaga K. Allotypes of the fourth component of complement in Koreans. THE JAPANESE JOURNAL OF HUMAN GENETICS 1992; 37:285-92. [PMID: 1297448 DOI: 10.1007/bf01883319] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The analysis of genetic polymorphism in C4 was performed on EDTA-plasma from 169 healthy unrelated Koreans. Plasma samples were subjected to high-voltage agarose gel electrophoresis followed by immunofixation. C4B allotypes were further detected by a hemolytic overlay method. The allele frequencies of C4A and C4B were as follows; for C4A, C4A*3 = 0.6099, C4A*4 = 0.1702, C4A*Q0 = 0.1525, C4A*2 = 0.0461, and C4A*R = 0.0213; for C4B, C4B*1 = 0.6406, C4B*2 = 0.2740, C4B*5 = 0.0569, C4B*Q0 = 0.0178, and C4B*R = 0.0107. C4A*3 and C4B*1 were among the most common alleles at each locus. C4A*6 was not detected in this study, but this allele is relatively common in both Caucasoid and Negroid populations. C4B*5 is a common allele in Asian, which is rare in Caucasoids and Negroids. C4B*5 appeared to be a characteristic allele of Oriental. In the C4A locus, five individuals with duplicated allotypes (three C4A 3,3 + 2, one C4A 4,3 + 2, and one C4A 3,3 + 3) were observed, and in the C4B locus, one individual with duplicated allotype (C4B 1,1 + 1) was detected.
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403
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Aoki H, Yaworsky PJ, Patel SD, Margolin-Brzezinski D, Park KS, Ganoza MC. The asparaginyl-tRNA synthetase gene encodes one of the complementing factors for thermosensitive translation in the Escherichia coli mutant strain, N4316. EUROPEAN JOURNAL OF BIOCHEMISTRY 1992; 209:511-21. [PMID: 1425658 DOI: 10.1111/j.1432-1033.1992.tb17315.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Escherichia coli strain N4316 is a mutant that exhibits temperature-sensitive growth at 43 degrees C and temperature-sensitive translation in vivo and in vitro. Extracts of the mutant produce an aberrant pattern of translation products of MS2 bacteriophage RNA. Previous work has shown that a protein, called 'rescue', isolated from the parental strain partly corrects the defective translation in vitro. Here we report the purification to homogeneity of a second factor from ribosomal eluates of the wild-type parental strain; the purified protein is a homodimer of 54 kDa. The partial sequence of the second protein was determined, and a recombinant plasmid was isolated based on its ability to complement the temperature-sensitive growth phenotype of the mutant at the non-permissive temperatures. The cloned gene was sequenced, mapped to the 20.9-min region of the E. coli chromosome and shown to code for a 466-amino-acid protein with a molecular mass of 52 kDa. Analysis of the DNA sequence and the correspondence to that of the partial protein sequence has identified the complementing factor as asparaginyl-tRNA synthetase. Marker rescue experiments indicate that the asnS mutation in N4316 resides within the motif 2 domain of the synthetase. A potential role of this synthetase in restoring normal protein synthesis with respect to ribosomal frameshifting, read-through of nonsense codons and protein copy number is discussed.
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404
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Park KS, Sohn DH, Veech RL, Song BJ. Pre-translational induction of pentoxyresorufin O-depentylase by pyridine. Biochem Biophys Res Commun 1992; 185:676-82. [PMID: 1610360 DOI: 10.1016/0006-291x(92)91678-j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Pentoxyresorufin O-depentylase activity, mainly associated with phenobarbital-inducible cytochrome P450IIB1 (designated CYP2B1), was increased after a single treatment of pyridine (250 mg/kg, i.p.), and further increased by repeated treatments for 5 days. The catalytic activity and immunoreactive protein of CYP2B recognized by polyclonal antibodies were significantly induced by a relatively high dose of pyridine (250 mg/kg, i.p.) while ethanol-inducible cytochrome P450IIE1 (CYP2E1) could be induced by a low dosage (25 mg/kg, i.p.). Unlike CYP2E1 induction without changing its mRNA level, the induction of CYP2B by pyridine was accompanied by an elevation of its mRNA, indicating a pre-translational activation of this enzyme. These results indicate that pyridine induces various isozymes of cytochromes P450 by different induction mechanisms.
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405
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Moon CK, Park KS, Kim SG, Won HS, Chung JH. Brazilin protects cultured rat hepatocytes from BrCCl3-induced toxicity. Drug Chem Toxicol 1992; 15:81-91. [PMID: 1555525 DOI: 10.3109/01480549209035174] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Brazilin, the main constituent of Caesalpinia sappan, is an antioxidative substance that has catechol moiety in its chemical structure. Considering the antioxidant-activity of brazilin, it was expected to have protective effects on the toxicities of radical generating chemicals. The incubation of rat hepatocytes with BrCCl3 resulted in significant increase in lipid peroxidation, leakage of cytoplasmic enzymes and cytoplasmic glutathione depletion. The BrCCl3-induced toxicities on hepatocytes were reduced by the treatment of brazilin. Brazilin has been also proved to have a protective effect on the BrCCl3-induced depression of microsomal calcium sequestration activity. These results indicate that brazilin plays a protective role in BrCCl3-induced hepatocyte injury of the rat.
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406
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Shimizu K, Park KS, Enoki Y. The XmnI site 5' to the G gamma-globin gene polymorphism and its relationship to %Hb F and %G gamma in normal Japanese and Korean adults. Hum Hered 1992; 42:253-8. [PMID: 1380946 DOI: 10.1159/000154078] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The ratio of fetal hemoglobin to total hemoglobin (%Hb F), the ratio of G gamma to total gamma globin (%G gamma), and the polymorphism of the XmnI site at -158 base pairs from the cap site of the G gamma-globin gene were examined in normal unrelated Japanese (n = 113) and Korean (n = 44) adults. The frequency of the presence of the XmnI site was 0.15 in the Japanese and 0.16 in the Korean population. There were statistically significant differences in the %G gamma values of the Japanese between those +/+ and those +/- or -/- at the XmnI site (p less than 0.01). The Korean %G gamma values showed a statistically significant difference (p less than 0.01) between those +/- and those -/-. The presence of the XmnI site was significantly associated with the elevation of G gamma-globin chain synthesis, but this relationship was not necessarily absolute. The absence of the XmnI site in an adult with a gamma-globin gene triplication (G gamma AG gamma A gamma/G gamma A gamma) more or less reduced the level of G gamma-globin chain synthesis, but the presence of the XmnI site in an adult with a gamma-globin gene deletion (GA gamma/G gamma A gamma) had no effects on the proportion of the two gamma-globin chains.
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407
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Shimizu K, Park KS, Harihara S, Enoki Y. Relationships between %Hb F or %G gamma and the haplotypes in the beta-globin gene cluster in the normal adult Japanese and Korean populations. Hum Hered 1992; 42:216-21. [PMID: 1380944 DOI: 10.1159/000154073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Haplotypes or subhaplotypes in the beta-globin gene cluster were examined in 31 normal Japanese and 21 Korean families. Major haplotypes were VII, V, and I, which shared a common subhaplotype [+----], and occurred in 70% of the Japanese and 68% of the Koreans. Three haploypes which shared a common subhaplotype [-+-++], bearing the XmnI site 5' to the G gamma-globin gene, occurred in 13% of the Japanese and 7.3% of the Koreans. One subhaplotype [-++-+], which is closely linked to the A gamma T-globin gene, had an incidence of 6.6% in the Japanese and 20% in the Koreans. Rare subhaplotypes [---++], and [- +] which has been observed mainly in Melanesians and Polynesians, and a very rare subhaplotype [-----] were observed. The present study suggests that high or low G gamma-globin chain production is closely related to subhaplotypes [-+-++] and [+----], respectively, among the normal adult population.
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408
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Park KS. [Home health care in general hospitals]. TAEHAN KANHO. THE KOREAN NURSE 1991; 30:36-45. [PMID: 1779591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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409
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Sohn DH, Yun YP, Park KS, Veech RL, Song BJ. Post-translational reduction of cytochrome P450IIE by CCl4, its substrate. Biochem Biophys Res Commun 1991; 179:449-54. [PMID: 1883371 DOI: 10.1016/0006-291x(91)91391-o] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The molecular mechanism of cytochrome P450IIE reduction by CCl4 was reexamined by measuring its enzyme activity, immunoreactive protein contents, and mRNA levels. Aniline hydroxylase and the amounts of immunoreactive P450IIE were rapidly decreased in a time-dependent manner after a single dose of CCl4. No changes were observed in the amounts of immunoreactive P450IIC and P450IA despite significant decreases decrease in their catalytic activities. However, the decreases in P450IIE enzyme activity and immunoreactive protein by CCl4 were not accompanied by a decline in its mRNA level. The data thus suggested a post-translational reduction of P450IIE by CCl4, probably due to specific destruction of the P450IIE protein by its own substrate rather than heme moiety.
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410
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Park KS, Rhee BD, Lee KU, Kim SY, Lee HK, Koh CS, Min HK. Intra-abdominal fat is associated with decreased insulin sensitivity in healthy young men. Metabolism 1991; 40:600-3. [PMID: 1865823 DOI: 10.1016/0026-0495(91)90050-7] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
To distinguish the relative role of intra-abdominal and subcutaneous abdominal fat in metabolic aberrations in upper body fat localization, we measured the relationship between regional fat distribution and insulin sensitivity in nine young men (28.6 +/- 0.7 years; body mass index [BMI], 24.7 +/- 1.3 kg/m2). Regional fat distribution was measured by anthropometric measurement and computed tomography (CT). Insulin sensitivity was measured by euglycemic hyperinsulinemic glucose clamp. Insulin sensitivity, expressed as the ratio of rate of glucose utilization to the mean plasma insulin concentration during the second hour of glucose clamp (M/I) was negatively correlated with BMI (r = -.91, P less than .001), waist to hip girth ratio (WHR) (r = -.80, P less than .01), subcutaneous abdominal fat area (r = -.90, P less than .001), and intra-abdominal fat area (r = -.88, P less than .01). Stepwise forward regression analysis showed that in addition to BMI, intra-abdominal fat area was a significant correlate of decrease in insulin sensitivity. These findings suggest that intra-abdominal fat play an important role in decreasing insulin sensitivity, even in healthy young men.
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411
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Kang BS, Lee YH, Nam TS, Yeon DS, Hwang SK, Park KS. Effects of ketamine on contractile responses in vascular smooth muscle. Yonsei Med J 1990; 31:325-32. [PMID: 2077757 DOI: 10.3349/ymj.1990.31.4.325] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
This study was designed to determine the effects of ketamine on contractions induced by norepinephrine (NE), K+ or histamine (Hist) and on agonist-induced calcium mobilization, in rabbit thoracic aorta with or without endothelium. Contractile responses to NE, K+ or Hist were markedly attenuated by prior exposure to ketamine. Subsequent addition of ketamine to the rabbit aorta undergoing an isometric contraction induced by NE, K+ or Hist also decreased the contractile responses in a calcium ion concentration-dependent manner. Preincubation with ketamine produced a concentration-dependent inhibition of contractile responses elicited by the addition of calcium ion (1.6 mM) to a Ca(++)-free depolarizing solution. However, the phasic contraction produced by NE with 2mM lanthanum pretreatment, which is release of intracellular calcium, was also inhibited by ketamine. Moreover, the tonic contraction produced by NE after depletion of the agonist-releasable pool of intracellular calcium, which is thought to be due to calcium influx, was depressed by ketamine. These data suggest that ketamine relaxes NE-contracted rings of rabbit thoracic aorta by decreasing calcium entry and by producing an extracellular calcium-independent relaxant effect.
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412
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el Kouni MH, Naguib FN, Park KS, Cha S, Darnowski JW, Soong SJ. Circadian rhythm of hepatic uridine phosphorylase activity and plasma concentration of uridine in mice. Biochem Pharmacol 1990; 40:2479-85. [PMID: 2148479 DOI: 10.1016/0006-2952(90)90089-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The activity of hepatic uridine phosphorylase (EC 2.4.2.3.) in male mice (24-29 g) maintained in standardized conditions of 12 hr light (0600-1800 hr) alternating with 12 hr darkness (1800-0600 hr), food and water ad lib., exhibited a circadian rhythm (P less than 0.0001, Cosinor analysis). The peak of enzyme activity (559 +/- 25 pmol/min/mg protein) occurred at 15 hr after light onset (HALO) with the nadir (139 +/- 25 pmol/min/mg protein) at 3 HALO when samples were taken every 4 hr. Female mice showed essentially the same pattern. A circadian rhythm (P less than 0.0001, Cosinor analysis) was also observed when the light-dark cycle was shifted (reverse cycle) so that the lights went on at 2200 hr and off at 1000 hr. Under the reverse cycle condition, there was a corresponding shift in the enzyme activity with a lag period of 3.5 hr in the time of maximum and minimum enzyme activities (i.e. the peak at 11 HALO and the nadir at 23 HALO) after a 2-week adaptation period. The lag period was reduced to 1 hr after 4 weeks of adaptation, and no further change was observed after 6 weeks of adaptation. The plasma concentration of uridine also exhibited a circadian rhythm (P less than 0.0001, Cosinor analysis) with peak concentration (10 microM) occurring at 2 HALO and a nadir (5 microM) at 14 HALO. The circadian rhythm observed in the plasma concentration of uridine is the inverse of that for uridine phosphorylase activity. These results demonstrate that hepatic uridine phosphorylase plays an important role in the regulation of the uridine level in the blood which, in turn, may be involved in the humoral control of sleep by uridine. This may also be of clinical significance in enhancing the antitumor efficacy of the 5-fluorinated pyrimidines by modulating the time of their administration.
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413
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Park KS, Kim NB, Woo HJ, Yoon YY, Lee KY. An environmental research on trace elements in freshwater fish by neutron activation analysis. Biol Trace Elem Res 1990; 26-27:347-54. [PMID: 1704738 DOI: 10.1007/bf02992689] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
For a case study of environmental contamination, radiochemical activation analysis has been applied to the crucians collected in the Han River. Sixteen trace elements (Hg, Cd, As, Br, Cu, Na, K, Se, Cr, Hf, Rb, Fe, Zn, Co, La, and Cs) were separated into three groups using distillation and diethyldithiocarbamate extraction methods, and their contents were determined by a single comparator method. Compared with the values 15 years ago, the values for mercury and cadmium have been drastically decreased at the middle and lower part of the river, but no typical change is found in other elements.
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414
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Park KS, Rhee BD, Lee KU, Lee HK, Koh CS, Min HK. Hyperglycemia per se can reduce plasma free fatty acid and glycerol levels in the acutely insulin-deficient dog. Metabolism 1990; 39:595-7. [PMID: 2191188 DOI: 10.1016/0026-0495(90)90024-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
To evaluate the in vivo effect of hyperglycemia per se on plasma free fatty acid (FFA) and glycerol concentrations, euglycemic and hyperglycemic clamp studies were performed in six overnight fasted dogs in the state of insulin deficiency produced by somatostatin (SRIF) infusion. The mean blood glucose concentrations during the steady-state (the second hour of each study) averaged 4.65 +/- 0.10 mmol/L in euglycemic clamp and 14.11 +/- 0.10 mmol/L in hyperglycemic clamp. During the SRIF infusion, plasma FFA concentrations increased from 0.32 +/- 0.05 mumol/mL at the basal state to 0.76 +/- 0.04 mumol/mL at the steady-state in euglycemic clamp and from 0.26 +/- 0.04 mumol/mL to 0.43 +/- 0.02 mumol/mL in hyperglycemic clamp. Plasma glycerol concentrations increased from the basal value of 0.07 +/- 0.01 mumol/mL to 0.15 +/- 0.01 mumol/mL during the steady-state in euglycemic clamp and from 0.06 +/- 0.01 mumol/mL to 0.08 +/- 0.01 mumol/mL in hyperglycemic clamp. The steady-state concentrations of plasma FFA and glycerol in hyperglycemic clamp were significantly lower than those in euglycemic clamp (P less than .001; respectively). These results suggest that hyperglycemia per se might decrease plasma FFA and glycerol concentrations at least in part by decreasing lipolysis in the acutely insulin-deficient dog.
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415
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Park KS, Rifat S, Eck H, Adachi K, Surrey S, Poncz M. Biologic and biochemic properties of recombinant platelet factor 4 demonstrate identity with the native protein. Blood 1990; 75:1290-5. [PMID: 2178704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Platelet factor 4 (PF4) is a 70 amino acid protein released from the alpha-granules of platelets after activation. The exact biologic function of this protein is unknown. We have constructed an expression vector for recombinant PF4 (rPF4) in the T7-based promoter vector pT7-7 to better study the relationship between PF4 structure and function. The protein was expressed in Escherichia coli and purified to homogeneity by heparin-agarose affinity chromatography and reverse-phase high-performance liquid chromatography. Purity of protein was confirmed by immunoblot analysis and sodium dodecyl sulfate-polyacrylamide gel electrophoresis, which resulted in a single component with a molecular weight of 8,000 daltons. The amino acid composition and sequence of the N-terminal 20 residues showed that rPF4 is identical to PF4 prepared from human platelets (hPF4), except for an N-terminal initiating methionine residue. Immunoblots revealed that rPF4 and hPF4 bound polyclonal anti-hPF4 equally well, while chemotaxis experiments demonstrated similar potencies as neutrophil attractants. Dose-dependent neutrophil chemotactic responses and competitive studies with polyclonal anti-hPF4 antiserum further demonstrate similar chemotactic properties of the two PF4 species. In conclusion, our data show that this recombinant protein and the native protein appears to have similar immunologic, heparin-binding, and chemotactic properties. The chemotactic properties of hPF4 appear to be entirely intrinsic to the protein and not due, in part, to any contaminating protein. Furthermore, our expression vector should prove useful for the construction of recombinant forms of PF4 to investigate structure/function relationships of this biologically important protein.
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416
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Lemmi CA, Pelikan PC, Sikka SC, Hirschberg R, Geesaman B, Miller RL, Park KS, Liu SC, Koyle M, Rajfer J. Cyclosporine augments renal mitochondrial function in vivo and reduces renal blood flow. THE AMERICAN JOURNAL OF PHYSIOLOGY 1989; 257:F837-41. [PMID: 2589485 DOI: 10.1152/ajprenal.1989.257.5.f837] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The in vivo action of cyclosporine A (CS) on rat renal cortical mitochondria was investigated. CS (30 mg.kg-1.day-1) given orally to rats for 30 days caused an augmentation of renal mitochondrial oxidative phosphorylation. The ADP-stimulated respiratory rate was increased by 37.0% with glutamate plus malate as respiratory substrates (P less than 0.025) but not with succinate-supported respiration, indicating enhancement of mitochondrial complex I activity. This reaction may be a response to the 32.5% reduction of renal blood (P less than 0.005) in the CS-treated group, possibly serving to maximize ATP synthesis during ischemia. Ligation-induced decreases in renal blood flow also resulted in enhancement of mitochondrial complex I activity.
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417
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Frost BF, Park KS, Tuck M, Disa S, Kim S, Paik WK. Site-specificity of histone H1 methylation by two H1-specific protein-lysine N-methyltransferases from Euglena gracilis. THE INTERNATIONAL JOURNAL OF BIOCHEMISTRY 1989; 21:1061-70. [PMID: 2512189 DOI: 10.1016/0020-711x(89)90241-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
1. The histone H1 fractions from rat spleen and liver were used as substrates for two H1-specific protein-lysine N-methyltransferases, V-A and V-B (protein methylase III) from Euglena gracilis. 2. When the enzymatically [methyl-3H]labeled H1 fractions were resolved by two-dimensional gel electrophoresis, four subtypes were found to be methylated (H1b, H1c, H1d and H1e). Both enzymes methylated H1c and H1b to approximately the same extent; H1d and H1e were methylated preferentially by enzyme V-B and V-A, respectively. 3. Histone H1c, [methyl-3H]labeled by the methyltransferase V-A, which had been digested by arginine-specific protease (Arg C protease), showed a single radioactive peptide on HPLC, indicating methylation site specificity of the enzyme. 4. Arg C protease-digestion of [methyl-3H]labeled H1c labeled by methyltransferase V-B indicated that this enzyme methylated two sites on the histone molecule. 5. The histone H1c methylation sites of these two enzymes did not overlap, indicating the two enzymes have different site specificity. 6. In combination with the other results, this suggests that the two enzymes serve discrete purposes, possibly involving the presumed different actions of histone H1 subtypes.
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418
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Shimizu K, Park KS, Omoto K. The DNA polymorphisms of the beta-globin gene cluster and the arrangements of the alpha- and the gamma-globin genes in Koreans. Hemoglobin 1989; 13:137-46. [PMID: 2567725 DOI: 10.3109/03630268908998063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The DNA polymorphisms at the seven restriction sites in the beta-globin gene cluster in healthy Koreans were examined using four restriction endonucleases, Hinc II, Hind III, Ava II, and Bam HI. Seven (f = 0.326) and four individuals (f = 0.246) were homozygous for [+-----+] and [+----+-], respectively, among 66 individuals examined. As to the subhaplotypes 5' to the delta-globin gene, 25 (f = 0.615) and three individuals (f = 0.213) were homozygous for [+----] and [-+-++], respectively. The frequency of [-++-+], which carries the A gamma T-globin gene, may be low in this population. It was recognized again that [+/+] at the Hinc II site 5' to the epsilon-globin gene always accompanied [--+--] at the Hinc II sites in and 3' to the psi beta 1-globin gene. The Korean, Japanese, and Chinese populations were not significantly different from each other in their haplotypes (subhaplotypes). The frequencies of the abnormal alpha- and gamma-globin gene arrangements in Koreans were low. alpha-Thalassemia may occur at low frequency in Koreans.
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419
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Frost B, Park KS, Kim S, Paik WK. Effect of enzymatic methylation of apocytochrome c on holocytochrome c formation and proteolysis. THE INTERNATIONAL JOURNAL OF BIOCHEMISTRY 1989; 21:1407-14. [PMID: 2558925 DOI: 10.1016/0020-711x(89)90163-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
1. Methylation of the lysine at residue 72 of yeast apocytochrome c increases its import into mitochondria. 2. Using methylated and unmethylated apocytochrome c as substrate and intact yeast mitochondria and a solubilized mitochondrial fraction as a source of cytochrome c heme lyase, the results show that the methylation state of the apoprotein has no significant effect on its conversion to holoprotein. 3. The above result suggests that the import mechanism is separate from the heme-attaching activity. 4. Unmethylated apocytochrome c was less resistant to a yeast homogenate fraction that methylated apocytochrome c, suggesting that methylation of apocytochrome c alters the conformation of the whole protein.
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420
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Park KS, Frost BF, Shin S, Park IK, Kim S, Paik WK. Effect of enzymatic methylation of yeast iso-1-cytochrome c on its isoelectric point. Arch Biochem Biophys 1988; 267:195-204. [PMID: 2848448 DOI: 10.1016/0003-9861(88)90023-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Yeast iso-1- unmethylated and methylated apocytochrome c were synthesized in vitro by translating yeast cytochrome c mRNA, and by subsequently methylating the protein product. Unmethylated and methylated iso-1-holocytochrome c were extracted from Saccharomyces cerevisiae. By employing a column isoelectrofocusing technique, the pI values of these proteins were determined. The pI values of unmethylated and methylated apocytochrome c were found to be 9.60 and 8.70, respectively, with a difference of 0.90 pI unit. On the other hand, the pI values of unmethylated and methylated holocytochrome c were 9.72 and 9.68, respectively, with a difference of 0.04 unit. Therefore, although the pI values of both apo- and holocytochrome c decreased by methylation, methylation of apocytochrome c had a more profound effect on the pI of the protein. The result also indicated that conjugation of heme to apocytochrome c increased its pI value, resulting in the more "compact" and basic structure of the protein. The observed magnitude of the pI change subsequent to the methylation of apocytochrome c (decrease of 0.90 unit) seemed to be contradictory to the predicted increase in the value, since the positive charge is fixed on the quaternary amino group of trimethyllysine and there is no proton to titrate. Trimethylation of epsilon-NH2 group of Res-72 lysine of apocytochrome c could disrupt any possible hydrogen bond formed by the nitrogen atom of Res-72 lysine residues, as visualized by a space-filling model. The model and observed shift in the "effective charge" of the protein strongly suggest that conformational change in the apoprotein takes place upon methylation. This presumably altered conformation along with the decrease in pI caused by methylation may play a role in enhancement of apocytochrome c import into mitochondria.
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421
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Park KS. [Seminar on nursing administration. Ford development of labor and industrial relations]. TAEHAN KANHO. THE KOREAN NURSE 1988; 27:30-6. [PMID: 3204975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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422
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Park KS, Yanagisawa M, Tokunaga K, Omoto K. Genetic polymorphisms of complement components C6 and C7 in Korean. JINRUI IDENGAKU ZASSHI. THE JAPANESE JOURNAL OF HUMAN GENETICS 1988; 33:325-31. [PMID: 3204686 DOI: 10.1007/bf02032862] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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423
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Schnell RC, Park KS, Davies MH, Merrick BA, Weir SW. Protective effects of selenium on acetaminophen-induced hepatotoxicity in the rat. Toxicol Appl Pharmacol 1988; 95:1-11. [PMID: 2901147 DOI: 10.1016/s0041-008x(88)80002-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Experiments were undertaken to examine the ability of selenium to protect against acetaminophen-induced hepatotoxicity and to examine possible mechanisms for this protective effect. Pretreatment of male, Sprague-Dawley rats with sodium selenite (12.5 mumol Se/kg, ip) 24 hr prior to acetaminophen administration produced a significant protection against the hepatotoxic effects of acetaminophen as assessed by a decrease in the plasma appearance of alanine aminotransferase and aspartate aminotransferase activities following acetaminophen. This was accompanied by an increase in the hepatic glutathione levels in selenium-treated animals and an inhibition in the decrease in hepatic glutathione content observed in animals receiving hepatotoxic doses of acetaminophen. Selenium pretreatment decreased the in vivo covalent binding of acetaminophen metabolites to hepatic protein, but did not alter hepatic microsomal cytochrome P-450 content or NADPH cytochrome c reductase activity, suggesting that selenium does not significantly alter the metabolism of acetaminophen to reactive electrophilic metabolites by the cytochrome P-450-dependent mixed-function oxidase enzyme system. Selenium produced an increase in the activity of gamma-glutamylcysteine synthetase which may account for the increased glutathione availability in selenium-treated animals and increased the activities of glutathione S-transferase and glucose-6-phosphate dehydrogenase. Examination of the urinary metabolite profile in selenium-treated animals revealed that the urinary excretion of acetaminophen and its metabolites was significantly increased over a 72-hr period. The increase occurred in the AAP-glucuronide metabolite while parent AAP and AAP-sulfate were actually decreased in selenium-treated rats. No change in recovery was observed in the AAP-glutathione or AAP-mercapturate urinary metabolites. While the glutathione conjugating system is enhanced by selenium treatment, amelioration of acetaminophen toxicity is most likely the result of enhanced glucuronidation which effectively diverts the amount of acetaminophen to be converted by the cytochrome P-450 system to the toxic metabolite.
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424
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Harihara S, Saitou N, Hirai M, Gojobori T, Park KS, Misawa S, Ellepola SB, Ishida T, Omoto K. Mitochondrial DNA polymorphism among five Asian populations. Am J Hum Genet 1988; 43:134-43. [PMID: 2840820 PMCID: PMC1715355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Mitochondrial DNA (mtDNA) polymorphisms were detected using 13 restriction enzymes on the total DNA obtained from blood samples of five Asian populations: Japanese and Ainu of northern Japan, Korean, Negrito (Aeta) of the Philippines, and Vedda of Sri Lanka. Of a total of 28 restriction-enzyme morphs detected, eight had not been reported previously. By combining the morphs, we were able to classify mtDNAs of 243 individuals into 20 mtDNA types. Phylogenetic analyses using maximum parsimony and genetic distance methods both showed that the Japanese, Ainu, and Korean populations were closely related to each other. Aeta was found to show a relatively close relationship to these three populations, confirming the conclusion from previous studies of blood markers. In contrast, Vedda was quite different from the other four populations.
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425
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Park KS, Lee HW, Hong SY, Shin S, Kim S, Paik WK. Determination of methylated amino acids in human serum by high-performance liquid chromatography. J Chromatogr A 1988; 440:225-30. [PMID: 3136187 DOI: 10.1016/s0021-9673(00)94526-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Employing high-performance liquid chromatography with isocratic elution using a two-column system (mu Bondapak C18 and mu Bondapak CN) and phenyl isothiocyanate as a fluorogenic reagent, NG-monomethylarginine (MMA). NG-dimethylarginines, and epsilon-N-trimethyllysine (TML) can be quatitatively separated from human serum samples. The recoveries of these amino acids were over 90%. It was observed that the serum concentrations of MMA, DMA and TML were significantly elevated in sera obtained from patients suffering from diabetes mellitus, hepatitis or hyperthyroidism, particularly the last condition.
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426
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Park IK, Shin S, Park KS, Kim S, Paik WK. Interrelationship between nuclear histone binding and cell proliferation. THE INTERNATIONAL JOURNAL OF BIOCHEMISTRY 1988; 20:183-7. [PMID: 3350202 DOI: 10.1016/0020-711x(88)90484-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
1. Binding of non-enzymatically [methyl-14C]-labeled histone H3 to nuclei isolated from young and old rat livers, regenerating rat liver, and tumor cells has been investigated. 2. Scatchard plot analysis indicated that various cell types had different binding capacity and different dissociation constant (Kd). 3. Nuclei isolated from younger rats had fewer binding sites and lower Kd (or higher Ka) values for [methyl-14C]H3 than those from older rats. 4. Fewer binding sites and lower Kd values were also observed with nuclei isolated from the maximally regenerating liver (24 hr after partial hepatectomy) and the fast-growing ascites tumor and Novikoff hepatomas. 5. These results strongly suggest that the number of binding sites and affinity of histone H3 for nuclei appears to be correlated with the degree of cell proliferation. 6. Fractionation of the [methyl-14C]H3 bound nuclei into nuclear membrane and nucleoplasm demonstrates that approx. 94% of radioactivity is associated with the former in which less than 6% of DNA is found, whereas 94% of total DNA is found in nucleoplasm. 7. This suggests that the binding of [methyl-14C]H3 to nuclei is independent of DNA present in each fraction.
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427
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Paik WK, Park KS, Frost BF, Kim S. Effect of enzymatic methylation on the import of in vitro synthesized apocytochrome C into mitochondria. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1988; 231:317-25. [PMID: 2843008 DOI: 10.1007/978-1-4684-9042-8_25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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428
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Park KS, Frost B, Tuck M, Ho LL, Kim S, Paik WK. Enzymatic methylation of in vitro synthesized apocytochrome c enhances its transport into mitochondria. J Biol Chem 1987; 262:14702-8. [PMID: 2822698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The gene for iso-1-cytochrome c from Saccharomyces cerevisiae was recloned into a pSP65 vector containing an active bacteriophage SP promoter. The iso-1-cytochrome c gene was cloned as an 856-base pair XhoI-HindIII fragment. When the resulting plasmid was digested at the HindIII site 279 bases downstream from the termination codon of the gene and transcribed in vitro using SP6 RNA polymerase, full length transcripts were produced. The SP6 iso-1-cytochrome c mRNA was translated using a rabbit reticulocyte lysate system, and the protein products were analyzed on sodium dodecyl sulfate-polyacrylamide gels. One major band with a molecular weight of 12,000 was detected by autofluorography and coincided with the Coomassie staining band of apocytochrome c from S. cerevisiae. The product was also shown to be identical with that of standard yeast apocytochrome c on an isoelectrofocusing gel. The in vitro synthesized iso-1-apocytochrome c was enzymatically methylated by adding partially purified S-adenosyl-L-methionine:cytochrome c-lysine N-methyltransferase (protein methylase III, EC 2.1.1.59) from S. cerevisiae along with S-adenosyl-L-methionine to the in vitro translation mixtures. The methylation was shown to be inhibited by the addition of the methylase inhibitor S-adenosyl-L-homocysteine or the protein synthesis inhibitor puromycin. The principal type of methylated amino acid in the protein was found to be epsilon-N-trimethyllysine which accounted for 77% of the total. Finally, the methylation of in vitro synthesized iso-1-apocytochrome c was found to increase its import into mitochondria isolated from S. cerevisiae 2-4-fold over unmethylated protein, but not into rat liver mitochondria. This suggests that methylation facilitates the import of apocytochrome c into mitochondria by a specific receptor mechanism.
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429
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Park KS, Frost B, Tuck M, Ho LL, Kim S, Paik WK. Enzymatic methylation of in vitro synthesized apocytochrome c enhances its transport into mitochondria. J Biol Chem 1987. [DOI: 10.1016/s0021-9258(18)47852-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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430
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Park KS, Lee NS. A three-dimensional Fourier descriptor for human body representation/reconstruction from serial cross sections. COMPUTERS AND BIOMEDICAL RESEARCH, AN INTERNATIONAL JOURNAL 1987; 20:125-40. [PMID: 3595096 DOI: 10.1016/0010-4809(87)90040-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This paper presents a three-dimensional Fourier descriptor (FD3) for shape representation/reconstruction. The FD3 is a double Fourier transform of serial cross-sectional contours of a shape in three dimensions (3D), which retains all shape information and gives a compact and invariant representation. The inverse Fourier transform of the FD3 reconstructs the original 3D shape; and it also estimates volume in the process. The upper bound of error introduced by the 3D reconstruction from the FD3 is derived in the sense of supremum norm. The FD3 method is compatible with medical imaging technologies such as computed tomography (CT) or magnetic resonance imaging (MRI). As an illustration of the FD3 methodology, a human head shape is reconstructed from its MR images.
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431
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Cho YB, Park KS, Kim S, Paik WK. Synthesis of NG-monomethylagmatine, a decarboxylation product of NG-monomethyl-L-arginine. Anal Biochem 1987; 160:429-33. [PMID: 3107423 DOI: 10.1016/0003-2697(87)90071-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
NG-Monomethylagmatine, a decarboxylation product of NG-monomethyl-L-arginine, has been synthesized by reacting putrescine with N,S-dimethylthiopseudouronium iodide. The structural identity of the product was confirmed by proton NMR and mass spectroscopy, and its properties were determined on thin-layer and electrophoretic chromatography.
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432
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Ogasawara N, Goto H, Yamada Y, Nishigaki I, Itoh T, Hasegawa I, Park KS. Deficiency of AMP deaminase in erythrocytes. Hum Genet 1987; 75:15-8. [PMID: 3804327 DOI: 10.1007/bf00273831] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Six individuals with complete deficiency of erythrocyte AMP deaminase have been discovered. They are all healthy and have no hematological disorders. The deficiency is only in isozyme E, which is the erythrocyte type isozyme, and is inherited as an autosomal recessive trait. The frequency of the mutant gene is surprisingly high, one heterozygote in about 30 of the population in Japan, Seoul, and Taipei. The ATP level is approximately 50% higher in AMP-deficient erythrocytes compared to that of control cells. Degradation of adenine nucleotide is slower in the deficient erythrocytes than in the control erythrocytes.
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433
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Park KS, Kim S, Paik WK. Histone binding to isolated rat liver nuclei. THE INTERNATIONAL JOURNAL OF BIOCHEMISTRY 1987; 19:455-9. [PMID: 3595992 DOI: 10.1016/0020-711x(87)90067-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Calf thymus histone H3 bound irreversibly to the isolated rat liver nuclei. The rate and extent of binding was a function of the incubation period and the concentration of both H3 and nuclei, but independent of the temperature. The binding was saturable and was inhibited by simultaneous presence of various histones. Approximately 94% of the bound H3 was associated with nuclear membrane fraction.
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434
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Park KS, el Kouni MH, Krenitsky TA, Chu SH, Cha S. Inhibition of uridine phosphorylase from Escherichia coli by benzylacyclouridines. Biochem Pharmacol 1986; 35:3853-5. [PMID: 3535805 DOI: 10.1016/0006-2952(86)90675-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The benzylacyclouridines, potent and specific inhibitors of mammalian uridine phosphorylase, were also found to be inhibitors of uridine phosphorylase but not thymidine phosphorylase from Escherichia coli. Competitive inhibition was observed in all cases and the most potent of these compounds was HM-BBAU (5-(3-benzyloxybenzyl)-1-[(2'-hydroxy-1'-hydroxymethyl)methyl]urac il) with a Ki value of 0.15 microM. The inhibitory potencies of these compounds parallel those obtained with enzymes from mammalian sources [Niedzwicki et al., Biochem. Pharmac. 31, 1857 (1982) and Naguib et al., manuscript in preparation] indicating that the structure of the active site of uridine phosphorylase from E. coli may resemble that of the mammalian enzyme.
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435
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Chung YH, Park KS, Lee KU, Kim SY, Lee HK, Min HK. High 24-hour urinary C-peptide excretion in non-insulin dependent diabetes mellitus. Korean J Intern Med 1986; 1:172-7. [PMID: 3154612 PMCID: PMC4536715 DOI: 10.3904/kjim.1986.1.2.172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The 24-hour urinary C-peptide excretion (UCPR) is a useful means of estimating total daily insulin secretion. To evaluate the daily insulin secretion rate in non-insulin dependent diabetes mellitus (NIDDM), we measured UCPR in 22 patients with NIDDM and 18 normal subjects. The mean (±SD) UCPR in the patients with NIDDM was 115.4±40.2 ug/day and that in normal subjects was 56.7±22.0 ug/day respectively with significantly higher values in the patients with NIDDM (P<0.0001). UCPR was positively correlated with body fat mass determined by measurement of skin fold thickness in both groups [r=0.51 in patients with NIDDM (n=22; p<0.02) and r=0.55 in normal subjects (n=18; p<0.02)], and was higher in NIDDM patients, even with the same degree of fat mass. There was no significant correlation between UCPR and body muscle mass both in the patients with NIDDM and normal subjects [r=0.16 in patients with NIDDM (n=22; p>0.1) and r=0.16 in normal subjects (n=18; p>0.1)]. This result suggested that the total daily insulin secretion rate in NIDDM be increased to compensate insulin resistance, especially that induced by adipose tissues.
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436
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Chang YH, Choi GS, Jeong WJ, Park KS, Kim JW, Joung NK, Lee SY, Choi HJ, Choi DY, Lim CY. Epidemiologic study of hepatitis B in pregnant Korean women. Korean J Intern Med 1986; 1:233-42. [PMID: 3154620 PMCID: PMC4536721 DOI: 10.3904/kjim.1986.1.2.233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The positive rates of hepatitis B viral markers according to many epidemiologic factors were analyzed in 2,873 pregnant women who delivered at St. Columban’s Hospital in Mokpo City from April 1st, 1985 to March 31st, 1986. The following results were obtained: The overall HBsAg positivity in all pregnant women was 8.3%. The positive rate of HBsAg was unrelated to age. It was 13.2% in the 11–20 year age group. 12.5% in the 31–40 year age group, 7.8% in the 21–30 year age group and 0.0% in the 41–50 year age group. The positive rate of HBsAg was slightly related to locality. It was a little higher in women who grew up in rural areas (8.6%) than in urban areas (7.7%). The positive rate of HBsAg was unrelated to educational background. The positive rate of HBsAg was unrelated to economic status. It was 8.7% in the highest income group and 8.6% in the lowest income group. The positive rate of HBsAg was higher in cases who had injections more than four times. The positive rate of HBsAg was higher, but not significantly, in cases who had received blood transfusion. The positive rate of HBsAg was higher, but not significantly, in cases who had more than three siblings (0.05
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437
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Park KS, Min BG, Lee CW. Analysis of visual evoked potentials using the time locus of potential distribution centre. Med Biol Eng Comput 1986; 24:169-73. [PMID: 3713278 DOI: 10.1007/bf02443931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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438
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Park KS, Tokunaga K, Omoto K. Genetic polymorphisms of human complement components BF and C2 in Korean: population and association studies. JINRUI IDENGAKU ZASSHI. THE JAPANESE JOURNAL OF HUMAN GENETICS 1985; 30:9-14. [PMID: 3847528 DOI: 10.1007/bf01883668] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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439
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Yamauchi K, Yasuda S, Kameyama S, Matuhasi T, Park KS, Asakawa S. [Automated microplate-photometry for titration of anti-diphtheria toxin by cell culture method and by enzyme-linked immunoassay]. RINSHO BYORI. THE JAPANESE JOURNAL OF CLINICAL PATHOLOGY 1984; 32:661-5. [PMID: 6492420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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440
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Schnell RC, Bozigian HP, Davies MH, Merrick BA, Park KS, McMillan DA. Factors influencing circadian rhythms in acetaminophen lethality. Pharmacology 1984; 29:149-57. [PMID: 6483961 DOI: 10.1159/000138005] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Experiments were conducted to examine the effects of changes in lighting schedules and food consumption on circadian rhythms in acetaminophen lethality and hepatic glutathione levels in male mice. Under a normal lighting schedule (light: 06.00-18.00 h), male mice exhibited a circadian rhythm in acetaminophen lethality (peak: 18.00 h; nadir: 06.00, 10.00 h) and an inverse rhythm in hepatic glutathione concentrations (peak: 06.00, 10.00 h; nadir: 18.00 h). Under a reversed lighting schedule (light: 18.00-06.00 h) the glutathione rhythm was reversed and the rhythm in acetaminophen lethality was altered showing greater sensitivity to the drug. Under continuous light, there was a shift in the acetaminophen lethality and the hepatic glutathione rhythms. Under continuous dark, both rhythms were abolished. Under a normal lighting regimen, hepatic glutathione levels were closely correlated with food consumption; i.e., both were increased during the dark phase and decreased during the light phase. Fasting the mice for 12 h abolished the rhythms in acetaminophen lethality and hepatic glutathione levels; moreover, the lethality was increased and the hepatic glutathione levels were decreased. These experiments show that both lighting schedules and feeding can alter the circadian rhythms in acetaminophen lethality and hepatic glutathione levels in male mice.
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441
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Cha EJ, Park KS, Lee CW, Kim KY, Min BG. Estimation of respiratory impedance and source pressure using a Thévenin equivalent circuit model. J Biomech 1983; 16:635-41. [PMID: 6643534 DOI: 10.1016/0021-9290(83)90113-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The objective of this paper is to present a new technique which can provide both active respiration source pressure and lung impedance in a single noninvasive test. The method is based upon a Thévenin equivalent circuit model of respiratory mechanics. Using this model, the equivalent source pressure and source impedance can be computed from the measured changes of respiratory pressures and flows in two consecutive cycles before and after addition of purely resistive loads to the mouth. In maximal breathing the source parameters were reproducible in six normal human subjects. The total respiratory resistance during maximal breathing had an average value of 3.46 cmH2O l-1 s-1, and the total dynamic compliance had an average value of 0.078 l cmH2O-1. The airway resistances measured using a plethysmographic method were within the range of 45-65% of the estimated total respiratory resistances. These two resistances were related with a correlation coefficient of 0.98. An average value of the magnitudes of the fundamental components of the source pressure was 6.73 cmH2O during maximal breathing and 2.09 cmH2O during spontaneous breathing.
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442
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Park KS, Inouye E, Asaka A. Plasma and urine uric acid levels: heritability estimates and correlation with IQ. JINRUI IDENGAKU ZASSHI. THE JAPANESE JOURNAL OF HUMAN GENETICS 1980; 25:193-202. [PMID: 7194385 DOI: 10.1007/bf01997695] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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443
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Ueda S, Omoto K, Park KS, Kudo T. Polymorphism of red cell glutamic-pyruvic transaminase in Japanese: gene frequencies in samples from Northern Japan. Hum Hered 1979; 29:208-12. [PMID: 478553 DOI: 10.1159/000153045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The genetic polymorphism of red cell GPT was investigated by starch-gel electrophoresis in four samples from northern Japan including a sample of the Ainu of Hokkaido. The distribution of the Gpt1 gene frequencies among 10 samples excluding the Ainu so far examined showed heterogeneity. The geographical cline of Gpt1 gene frequency reported in southern Japan was not observed in northern Japan.
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444
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Park KS. Heritability of urine and plasma amylase activity. JINRUI IDENGAKU ZASSHI. THE JAPANESE JOURNAL OF HUMAN GENETICS 1977; 22:79-88. [PMID: 604565 DOI: 10.1007/bf01874272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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445
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Ogita Z, Otsuki M, Park KS, Baba S. Genetical and biochemical studies on amylase isozymes in human serum and urine. JINRUI IDENGAKU ZASSHI. THE JAPANESE JOURNAL OF HUMAN GENETICS 1974; 19:56-7. [PMID: 4476835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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446
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Chaffin DB, Park KS. A longitudinal study of low-back pain as associated with occupational weight lifting factors. AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL 1973; 34:513-25. [PMID: 4272346 DOI: 10.1080/0002889738506892] [Citation(s) in RCA: 215] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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447
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