501
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Shin H, Kim JK. Hamiltonian formulation of Chern-Simons theory with matter fields in the broken-symmetry phase. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1992; 46:868-870. [PMID: 10015000 DOI: 10.1103/physrevd.46.868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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502
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Kim JK, Lee SM, Kim HT, Uh S, Chung Y, Kim YH, Park C, Jin SY, Lee DH. Pulmonary embolism as the initial manifestation of large cell lung cancer--a case report with review. Korean J Intern Med 1992; 7:143-8. [PMID: 1339079 PMCID: PMC4532105 DOI: 10.3904/kjim.1992.7.2.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Lung cancer is known as a risk factor of pulmonary embolism. We experienced a case of pulmonary embolism combined with pleural effusion and pleuritic chest pain as the initial manifestation of large cell lung cancer, which is a relatively rare cell type of lung cancer in Korea. We report it with a review of the literature.
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503
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Abraham WT, Hensen J, Kim JK, Dürr J, Lesnefsky EJ, Groves BM, Schrier RW. Atrial natriuretic peptide and urinary cyclic guanosine monophosphate in patients with chronic heart failure. J Am Soc Nephrol 1992; 2:1697-703. [PMID: 1323337 DOI: 10.1681/asn.v2121697] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Circulating concentrations of human atrial natriuretic peptide (hANP) are elevated in patients with heart failure; however, the natriuretic effect of hANP is blunted in these patients. In this study, the relationship between urinary cGMP, the second messenger for the natriuretic effect of hANP in vivo, and endogenous hANP was examined in six patients with heart failure and four normal subjects. In addition, right heart catheterization for the determination of central hemodynamics was performed in the heart failure patients. The heart failure patients were in New York Heart Association Classes II to IV and were receiving no medications at the time of the study. Supine plasma hANP and urinary cGMP concentrations were determined on two occasions in each subject, as were right and left atrial pressures in the heart failure patients. At the time of study, the patients were in positive sodium balance, and control subjects were in normal sodium balance. Plasma hANP and urinary cGMP excretion rates were elevated in heart failure patients as compared with those in controls: hANP, 139.0 +/- 42.0 versus 22.0 +/- 6.1 pg/mL (P less than 0.05); urinary cGMP, 1.14 +/- 0.31 versus 0.35 +/- 0.05 nmol/min (P less than 0.05). In heart failure patients, right atrial pressure correlated positively with plasma hANP (r = 0.96; P less than 0.01) and urinary cGMP concentrations (r = 0.93; P less than 0.05) and the excretion rate (r = 0.92; P less than 0.05). Moreover, plasma hANP was strongly correlated with urinary cGMP concentration (r = 0.91; P less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)
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504
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Howard RL, Summer S, Rossi N, Kim JK, Schrier RW. Short-term hypothyroidism and vasopressin gene expression in the rat. Am J Kidney Dis 1992; 19:573-7. [PMID: 1595706 DOI: 10.1016/s0272-6386(12)80837-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Hypothyroidism is associated with abnormalities in renal water handling, which include a delay in excretion of an acute water load, decreased urinary concentrating ability, and increased urine volume. In the present study, we investigated the role of vasopressin in aminotriazole-induced hypothyroidism by measuring vasopressin concentration in the plasma and pituitary along with vasopressin mRNA levels in the hypothalamus. After 5 weeks of aminotriazole treatment, L-thyroxine levels were significantly lower in the experimental animals (122 +/- 8 v 26 +/- 1 nmol/L [9.5 +/- 0.6 v 2.0 +/- 0.1 micrograms/dL]; P less than 0.001). Serum sodium (148 +/- 0.5 v 144 +/- 1.2 mmol/L [mEq/L]; P less than 0.01), and plasma osmolality (311 +/- 2.5 v 304 +/- 1.8 mmol/kg [mOsm/kg] H2O; P less than 0.05) were also lower in the experimental animals. There were no differences in plasma (1.9 +/- 0.4 v 1.5 +/- 0.2 pg/mL) or pituitary (1.5 +/- 0.4 v 1.5 +/- 0.2 microgram/pituitary) vasopressin levels. In addition, steady-state vasopressin mRNA levels were not different between the two groups (1,286 +/- 210 v 1,093 +/- 138 pg/hypothalamus). One week of L-thyroxine replacement resulted in significant increases in serum thyroxine levels without changes in the other variables measured. These results indicate that short-term hypothyroidism, which has been shown to exert substantial effects on renal function, causes only a modest central alteration in the plasma vasopressin-osmolality relationship, which occurs in the absence of detectable changes in vasopressin synthesis.
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505
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Kwon OJ, Kim JK, Lee C. Berry phase memorizes the motion of a boundary. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 45:6884-6886. [PMID: 9907814 DOI: 10.1103/physreva.45.6884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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506
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Kye WH, Hong SI, Kim JK. Phase transition of the sine-Gordon theory at finite temperature. Int J Clin Exp Med 1992; 45:3006-3007. [PMID: 10014697 DOI: 10.1103/physrevd.45.3006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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507
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Kim JK, Cao J, Wu R. Regulation and interaction of multiple protein factors with the proximal promoter regions of a rice high pI alpha-amylase gene. MOLECULAR & GENERAL GENETICS : MGG 1992; 232:383-93. [PMID: 1375314 DOI: 10.1007/bf00266241] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The alpha-amylase gene is known to be regulated by the plant hormone gibberellin (GA) in cereal aleurone cells. The accumulation of the mRNA corresponding to a rice high pI alpha-amylase gene, OSamy-c, was stimulated 20-fold by exogenous GA3 in half-seeds lacking embryos. Regulatory regions in the promoter of this high pI sub-family were analyzed. The OSamy-c 5' flanking sequence, spanning positions -231 to +29, was fused upstream of the beta-glucuronidase (GUS) gene coding region. The delivery of this plasmid into rice aleurone cells by the biolistic method resulted in a GA-stimulated synthesis of GUS. Gel retardation assays were performed to study protein-DNA interactions between putative regulatory sequences of OSamy-c and partially purified rice seed extracts. We identified multiple seed-specific protein factors that bind to proximal regions of the OSamy-c promoter between positions -231 and -162. Five different proteins were distinguished based on competitive binding studies. Three protein binding regions were located by footprinting analyses, one of which is located in the conserved sequence also found upstream of other GA-inducible genes. Two protein factors in rice aleurone cells that interact with the putative regulatory sequence do not require GA induction.
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508
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Rathbone MP, Szlapetis GK, de Villiers R, Del Maestro RF, Gilbert J, Groves J, Erola K, Kim JK. Astroglial growth factors in normal human brain and brain tumors: comparison with embryonic brain. J Neurooncol 1992; 12:205-18. [PMID: 1316434 DOI: 10.1007/bf00172708] [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: 12/26/2022]
Abstract
Aqueous extracts of 18-day embryonic chicken brains, 15-day embryonic and adult rat brains and human brain tumors, as well as control histologically-normal adult human brain taken from around brain tumors or around arteriovenous malformations each stimulated the growth of cultured chick astrocytes. Eight mitogenic fractions were separated reproducibly by Bio-Gel P-10 molecular seive chromatography. They had apparent molecular weights (M.W.) of 24, 17, 12, 9, 5, 2.8, 1.4 and 1.2 kD. The activity of each fraction was concentration dependent. The fractions did not appear to be artifactually derived by proteolysis from a larger mitogen since (i) protease inhibitors were added at the time of homogenization to prevent degradation, (ii) protease treatment did not produce large quantities of the lower molecular weight fractions, (iii) incubation of brain extracts for up to four hours at 30 degrees C did not alter the activity of the various mitogenic fractions and (iv) addition of albumin to inhibit protease activity similarly did not change the profile of the factors. In contrast, treatment with protease reduced the activity of all the factors although those with M.W. of 5 and 1.2 kD were inactivated more slowly than the others. The various fractions were stable when rechromatographed. This suggested they were not chance aggregates derived artifactually during extraction but rather might have physiological and pathological roles. The activities of each mitogenic fraction were significantly higher in brain extracts from embryonic rats than in those from adult rats. In brain extracts of rat and chicken embryos the fractions of lower M.W. 5 kD to 1.2 kD were relatively abundent. In contrast in brain extracts from adult rats the predominant mitogenic fractions had apparent M.W. of 24, 17 and 12 kD. In histologically normal adult human brain taken from around the tumors or around arteriovenous malformations the 5 kD fraction was present in small amounts and the fractions of lower molecular weight were present in very small amounts. In human glial brain tumors there was a preponderance of the 5 kD activity and more of the 2.8 and 1.4 kD activity fractions than in histologically normal adult human brain. But there was relatively less activity in the 24 and 17 kD fractions. The growth factor profile of human meningiomas was quite different from that of histologically normal human brain or human glial brain tumors. The fraction from meningiomas that was most mitogenic for astrocytes had a molecular weight of 12 kD.(ABSTRACT TRUNCATED AT 400 WORDS)
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509
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Rathbone MP, Middlemiss PJ, Kim JK, Gysbers JW, DeForge SP, Smith RW, Hughes DW. Adenosine and its nucleotides stimulate proliferation of chick astrocytes and human astrocytoma cells. Neurosci Res 1992; 13:1-17. [PMID: 1314349 DOI: 10.1016/0168-0102(92)90030-g] [Citation(s) in RCA: 86] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Aqueous extracts of the brains of 18-day-old white Leghorn chicken embryos contain several substances that stimulate proliferation of primary cultures of chick brain astrocytes. Most of the mitogens are peptides. Purification of one mitogenic fraction was obtained by centrifugation, passage through Amicon Diaflo membranes of nominal molecular weight cutoffs 30, 1 and 0.5 kDa, ion exchange chromatography and reverse phase high performance liquid chromatography (HPLC) using a Deltapak C18 column. The mitogenic fraction contained no amino acids. On the basis of its behaviour on thin layer chromatography, its ultraviolet absorption spectrum, its 1H and 31P nuclear magnetic resonance spectra and its behaviour on positive and negative ion fast atom bombardment mass spectrometry, the mitogenic material was identified as adenosine-5'-monophosphate (AMP). Other adenosine compounds including adenosine, ADP and ATP also stimulated proliferation of and [3H]leucine incorporation into primary cultures of astrocytes. Nitrobenzylthyioinosine (NBTI), an inhibitor of nucleoside transport, did not prevent the stimulation of [3H]leucine incorporation into cultured astrocytes. Polyadenylic acid (Poly A), that mimics the effect of adenosine at adenosine receptors, also stimulated proliferation of the astrocytes. The effects of adenosine and Poly A were not inhibited by 1,3-dipropyl-8-(2-amino-4-chlorophenyl)xanthine (PACPX) but were inhibited by 1,3-dipropyl-7-methyl-xanthine (DPMX), indicating that adenosine and Poly A acted at the cell surface, likely through adenosine A2 receptors. The stimulatory effect of ATP was biphasic. The proliferative effect of low, but not of high, concentrations of ATP were abolished by DPMX. The purinergic P2 receptor agonist 2-methylthioATP and, at higher concentrations, the P2y agonist, alpha,beta-methyleneATP also stimulated incorporation of [3H]thymidine. These data indicate that high concentrations of ATP stimulate cell proliferation through at a P2, possibly a P2y receptor. These results have considerable biological significance. After brain injury, or when cells in brain die or become hypoxic, nucleotides and nucleosides are released from the cells. Their extracellular concentrations can exceed those required to stimulate astrocyte proliferation in vitro. Therefore they may be partly responsible for gliotic changes following cell death in brain.
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510
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Kim JK, Alderfer JL. Conformational variations of the cis-syn cyclobutane-type photodimer in DNA and RNA. J Biomol Struct Dyn 1992; 9:705-18. [PMID: 1377471 DOI: 10.1080/07391102.1992.10507950] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The recent NMR study of a cis-syn photodimer B-DNA 10mer-duplex (Taylor et al., Biochemistry 29, 8858 (1990)) showed the cyclobutane (CB) ring with a puckered-twist in a right-handed sense (CB+). This is opposite to that of the crystal structure of cis-syn d-TpT(cyano-ethyl)(d-T[p]T-CE) which has a left-handed puckered-twist (CB-)(Hruska et al., Biopolymers 25, 1399 (1986)). 2D-NOESY experiments were performed on cis-syn d-T[p]T and cis-syn U[p]U at 25 and 35 degrees C, respectively, to investigate the puckering mode of the cyclobutane ring of isolated cis-syn photodimers of the DNA and RNA types. The DNA photodimers showed interconversion of the puckered-twist of the cyclobutane ring between CB- and CB+ and interconversion of the glycosidic angle between syn and anti in both nucleoside residues. Interestingly, in the RNA photodimer only the CB- puckering mode with syn conformation of the glycosidic angle of the U[p]- was observed. These different dynamical behaviors of the photodimer in DNA and RNA might portend differential conformational effects on their corresponding normal nucleic acid regions. In addition these results indicate differences in the cyclobutane ring conformation of the cis-syn d-T[p]T, not only in solution and crystalline states, but also when the dimer is isolated and in duplex forms.
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511
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Kim JK, Kim WT, Kye WH. Erratum: Minimal Wess-Zumino action in terms of chiral bosonization. Int J Clin Exp Med 1992; 45:717. [PMID: 10014428 DOI: 10.1103/physrevd.45.717] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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512
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Abstract
Korea has been conducting the National Nutrition Survey annually since 1969. Due to the magnitude and budget of the survey, its sample size was limited to 1,000. Since 1989, however, the government has increased the size to 2,000. We developed a new sampling design suitable when budget is limited and cases to be covered are relatively very small, which has been in use since 1987. The outline of the design is introduced. Basic sampling method adopted was Probability Proportional to Size (PPS) sampling. Using the Enumeration Districts (EDs) as primary sampling units (PSU), we selected 300 EDs and constructed six identical sample sets, each having 50 ED's. From each ED, we selected 20 households. Therefore, one set has 1,000 households. Currently, two sets are being used for the survey.
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513
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Wu SY, Kim JK, Chopra IJ, Murata Y, Fisher DA. Postnatal changes in lambs of two pathways for thyroxine 5'-monodeiodination in brown adipose tissue. THE AMERICAN JOURNAL OF PHYSIOLOGY 1991; 261:E257-61. [PMID: 1872387 DOI: 10.1152/ajpendo.1991.261.2.e257] [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: 12/29/2022]
Abstract
We have recently shown that ovine fetal brown adipose tissue (BAT) contains two distinct iodothyronine 5'-monodeiodinase (5'MDI) activities, one with a high Km (type I) and another with a low Km (type II). Both activities increased to maximum levels near term (150 days gestation). BAT plays a major role in neonatal temperature regulation in lambs, and available evidence suggests that BAT 5'MDI activity is closely linked to thermogenic capacity. To better characterize the changes in 5'MDI after birth, we studied both type I and type II 5'MDI in lamb BAT from the time of birth to 30 days of postnatal age. Type I 5'MDI activity [pmol 3,5,3'-triiodothyronine (T3).mg protein-1.h-1] showed no significant changes during the first 11 days after birth [newborn (NB), 95 +/- 16; 1 day, 83 +/- 20; 3-4 days, 80 +/- 11; 10-11 days, 92 +/- 28]. Activity decreased significantly at 30 days (24 +/- 8.9, P less than 0.05). On the other hand, the type II 5'MDI activity (fmol I- released.mg protein-1.h-1) increased significantly (P less than 0.01) during the first 4 days, (NB, 348 +/- 23; 1 day, 679 +/- 37; 3-4 days, 785 +/- 199), decreased toward NB values (401 +/- 87) at 10-11 days of age, and fell to 66 +/- 31 at 30 days (P less than 0.05 vs. NB). Kinetic analysis of BAT type II thyroxine 5'MDI revealed a rise in maximum velocity from NB to 1 and 3-4 days of age without a change in the enzymatic activity Km.(ABSTRACT TRUNCATED AT 250 WORDS)
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514
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515
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Lee J, Kim JK, Choi KC, Gill WS. High salt intake attenuates the development of hypertension in two-kidney, one-clip Goldblatt rats. PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE. SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE (NEW YORK, N.Y.) 1991; 197:181-5. [PMID: 1827673 DOI: 10.3181/00379727-197-43243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Effects of high salt intake on the early onset of hypertension were examined in two-kidney, one-clip rats. They were divided into high salt and control groups which were supplied with 1.0% NaCl and tap water, respectively, as a drinking solution for 12 days after clipping the left renal artery. The high salt group showed a lower plasma renin concentration and a higher plasma atrial natriuretic peptide (ANP) along with an attenuation of the magnitude of early hypertension, as compared with the control group. A significant positive correlation between blood pressure and plasma renin concentration and an inverse correlation between plasma renin concentration and ANP were shown. Cortical renal renin content was comparable between the two groups. In another two groups of sham-clipped rats, the high salt group did not differ from the tap water-drinking group in any of the parameters examined, except that ANP was significantly higher. These results demonstrate that high salt intake attenuates the developmental phase of hypertension in two-kidney, one-clip rats by increasing the ANP and suppressing the release of renin.
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516
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Chung KS, Kim JK. Conformal anomaly for string theory from stochastic quantization. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1991; 43:2050-2053. [PMID: 10013585 DOI: 10.1103/physrevd.43.2050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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517
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Kim JK, Rathbone MP, Middlemiss PJ, Hughes DW, Smith RW. Purinergic stimulation of astroblast proliferation: guanosine and its nucleotides stimulate cell division in chick astroblasts. J Neurosci Res 1991; 28:442-55. [PMID: 1649923 DOI: 10.1002/jnr.490280318] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A highly active fraction that was mitogenic for astroblasts but which contained no amino acids was identified during the purification of peptides from chick embryo brains. This material was purified by ultracentrifugation, ultrafiltration through Diaflo PM-30 and YM-2 membranes and retention on Diaflo YC-05, followed by ion exchange chromatography and reversed phase high performance liquid chromatography (HPLC) on a C18 Deltapak column. On thin layer chromatography and HPLC the material co-chromatographed with authentic commercially-obtained GMP. Its ultraviolet absorption spectrum was also identical with that of GMP. 1H and 31P nuclear magnetic resonance spectra of the isolated material were identical with those of GMP. The close match between the fast atom bombardment (FAB) mass spectra of the unknown material and authentic GMP indicated that the unknown material was GMP of molecular weight 363 Da. Authentic, commercial GMP stimulated the growth of cultured chick astroblasts in the same dose-dependent manner as the material from chick embryo brains; maximal stimulation was at 50 microM. Guanosine, GDP, and GTP also stimulated cell proliferation. The nucleotides were equally as effective as guanosine. 5'-Guanylyl imidodiphosphate, guanosine 5'-O-(2-thiodiphosphate), and guanosine 5'-N-(3-thiotriphosphate), guanine nucleotides which are relatively resistant to enzymatic hydrolysis, were also mitogenic, indicating that the nucleotides do not need to be degraded to nucleosides to be active and that they probably act extracellularly. Guanine nucleosides and nucleotides promoted astroblast growth when other growth factors were removed from the culture medium. The mitogenic effects of guanosine and its nucleotides were inhibited in a dose-dependent fashion by micromolar concentrations of theophylline, a characteristic of phenomena mediated by purinergic receptors. Guanosine and its nucleotides are released in micromolar concentrations by hypoxic or dying cells. Under these circumstances these compounds may stimulate division of adjacent cells in vivo.
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518
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Kim JK, Kim WT, Kye WH. Minimal Wess-Zumino action in terms of chiral bosonization. Int J Clin Exp Med 1991; 43:626. [PMID: 10013427 DOI: 10.1103/physrevd.43.626] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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519
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Park IH, Kim JK. A cohort analysis of phasic changes in family life cycle as basis for family health studies (summary). POGON SAHOE NONJIP = JOURNAL OF POPULATION, HEALTH, AND SOCIAL WELFARE 1990; 10:57-8. [PMID: 12179743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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520
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Kim JK, Michel JB, Soubrier F, Durr J, Corvol P, Schrier RW. Arginine vasopressin gene expression in chronic cardiac failure in rats. Kidney Int 1990; 38:818-22. [PMID: 2266664 DOI: 10.1038/ki.1990.276] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Arginine vasopressin (AVP) is known to be increased in patients and experimental animals with chronic cardiac failure (CCF). The importance of an increase in biosynthesis of AVP in the hypothalamus has, however, not heretofore been investigated and is the purpose of the present study. CCF secondary to infarction of myocardial tissue was induced by ligation of the left anterior descending coronary artery and sham operated animals served as controls. Four weeks later hypothalamic AVP mRNA was determined by solution hybridization using sense and anti-sense strand RNA. The blood pressure was lower in CCF than sham animals (131.2 +/- 3.1 vs. 112.8 +/- 4.0 mm Hg, P less than 0.05) and the total heart, and right and left ventricle weights were significantly higher in CCF rats. Plasma AVP was higher in CCF (sham 6.78 +/- 0.30; CCF 11.46 +/- 0.64 pg/ml, P less than 0.001) and plasma atrial natriuretic peptide was also higher in CCF than sham animals (205 +/- 36 vs. 554 +/- 56 pg/ml, P less than 0.001). The AVP mRNA in hypothalamus was significantly higher in CCF than sham animals (55.5 +/- 3.7 vs. 95.9 +/- 4.0 pg/micrograms total RNA, P less than 0.001). There was no difference in beta-actin mRNA in the hypothalamus of sham and CCF rats, indicating that the AVP-mRNA increase was specific in CCF. These results therefore demonstrate that increased AVP biosynthesis in the hypothalamus, in addition to release of the hormone from the posterior pituitary, may occur in CCF.
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521
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Kim JK, Soubrier F, Michel JB, Bankir L, Corvol P, Schrier RW. Arginine vasopressin gene regulation in the homozygous Brattleboro rat. J Clin Invest 1990; 86:14-6. [PMID: 2365813 PMCID: PMC296683 DOI: 10.1172/jci114676] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The Brattleboro rat, which has an autosomally recessive form of diabetes insipidus, has been reported to have a marked defect in the regulation of arginine vasopressin (AVP) gene expression. However, it is not known whether this is a primary genetic defect or occurs secondary to the urinary water losses which occur in the absence of circulating AVP in the Brattleboro rat. This present study was therefore undertaken to study AVP gene regulation in the Brattleboro rat after chronic AVP treatment by osmotic minipump for 2 wk. In Brattleboro rats without AVP treatment, neither urinary osmolality (Uosm) nor hypothalamic AVP mRNA was significantly changed after 24 h of fluid deprivation (Uosm, 413 +/- 33 to 588 +/- 44, NS; AVP mRNA, 39.33 +/- 2.95 to 46.39 +/- 2.71 pg/micrograms total RNA, NS). In contrast, when Brattleboro rats were treated with AVP for 2 wk, the regulation of AVP gene occurred in response to 24 h of fluid deprivation. In these studies, hypothalamic AVP mRNA was significantly increased compared with the Brattleboro rats still receiving AVP with free access of water (28.9 +/- 3.5 vs. 65.0 +/- 3.3 pg/micrograms total RNA, P less than 0.001). Further studies in Long-Evans rats demonstrate a similar response to a comparable degree of fluid deprivation as Uosm and AVP mRNA were significantly increased after 72 h of fluid deprivation (Uosm, 1,505 +/- 186 to 5,460 +/- 560 mosmol/kg, P less than 0.001; AVP mRNA, 31.7 +/- 3.9 to 77.5 +/- 4.6 pg/micrograms total RNA, P less than 0.001). These results indicate that AVP-replaced homozygous Brattleboro rats can regulate AVP gene expression normally in response to fluid deprivation. This finding indicates that the defect in AVP gene regulation in the Brattleboro rat not receiving AVP replacement is a secondary phenomenon rather than a primary genetic defect.
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522
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Choi JH, Kim JK. Higher-genus characters for the level-two SU(2) WZW model and GKO coset construction. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1990; 41:1908-1913. [PMID: 10012563 DOI: 10.1103/physrevd.41.1908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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523
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Chung WS, Kim JK. BRS analysis of supersymmetrized Zamolodchikov's spin-3 algebra. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1990; 41:1336-1338. [PMID: 10012476 DOI: 10.1103/physrevd.41.1336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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524
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Choi JH, Kim JK. Higher-genus characters of the Ising model. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1990; 41:484-491. [PMID: 10012355 DOI: 10.1103/physrevd.41.484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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525
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Kim JK, Park CJ, Yoon Y. Calabi-Yau manifolds from N=2 Landau-Ginzburg superconformal theories. Int J Clin Exp Med 1989; 40:3378-3386. [PMID: 10011705 DOI: 10.1103/physrevd.40.3378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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526
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Chung WS, Kim JK. BRST invariance of the N-string vertex at space-time dimension fewer than 26. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1989; 40:3537-3540. [PMID: 10011726 DOI: 10.1103/physrevd.40.3537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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527
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Kim JK, Summer SN, Durr J, Schrier RW. Enzymatic and binding effects of atrial natriuretic factor in glomeruli and nephrons. Kidney Int 1989; 35:799-805. [PMID: 2540377 DOI: 10.1038/ki.1989.55] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Atrial natriuretic factor (ANF) has been suggested to exert a tubular effect on the mammalian nephron, perhaps in part by interacting with other hormones. In the present study, the effect of ANF was examined on glomeruli (Gm) and different renal tubule segments including medullary (MAL) and cortical thick ascending limb (CAL) and cortical (CCT), outer medullary (OMCT) and inner medullary collecting tubules (IMCT). This effect of ANF was assessed by alteration in adenylate cyclase and cGMP in the various nephron segments in the presence and absence of arginine vasopressin (AVP), parathyroid hormone (PTH) and calcitonin (SCT). An effect of ANF (10(-8) M) was not demonstrated on adenylate cyclase (fmol cAMP formed/30 min/micrograms protein) in Gm, CAL, MAL, CCT, OMCT or IMCT. Nor did ANF (10(-8) M) interfere with the effect of PTH (5 IU/ml) on the Gm (PTH 35.1 +/- 3.7 vs. PTH + ANF 32.5 +/- 1.8, NS), CAL (PTH 50.5 +/- 10.9 vs. PTH + ANF 46.2 +/- 1.4, NS) or AVP (10(-8) M) on the CCT (AVP 40.8 +/- 6.6 vs. AVP + ANF 33.0 +/- 3.1, NS), OMCT (AVP 56.0 +/- 11.8 vs. AVP + ANF 42.1 +/- 6.7, NS), IMCT (AVP 66.5 +/- 4.6 vs. AVP + ANF 53.5 +/- 7.0, NS) or MAL (AVP 15.5 +/- 1.6 vs. AVP + ANF 14.0 +/- 2.6, NS). ANF also did not affect SCT (1.5 x 10(-8) M)-induced adenylate cyclase on CCT (SCT 69.8 +/- 11.3 vs. SCT + ANF 79.9 +/- 7.2, NS). ANF (10(-8) M), however, significantly increased cGMP in the Gm (6.4 +/- 1.7 to 121.3 +/- 32.4 fmol/micrograms protein, P less than 0.001) and IMCT (0.63 +/- 0.16 to 1.46 +/- 0.29 fmol/micrograms protein, P less than 0.05). However, no effect of ANF on cGMP was observed in the CAL, CCT, OMCT, and MAL even at 10(-7) M ANF. PTH (5 IU/ml) did not alter either basal or ANF-stimulated cGMP in the Gm. Also, specific ANF binding was studied in the microdissected IMCT. Kd was 6.08 x 10(-9) M and Bmax was 8.07 x 10(-11) M.(ABSTRACT TRUNCATED AT 250 WORDS)
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528
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Jun JW, Kim JK. Evaluation of the conformal anomaly of N=1 superstring theory by the stochastic quantization method. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1988; 38:3819-3822. [PMID: 9959149 DOI: 10.1103/physrevd.38.3819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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529
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Herin P, Kim JK, Schrier RW, Meschia G, Battaglia FC. Ovine fetal response to water deprivation: aspects on the role of vasopressin. QUARTERLY JOURNAL OF EXPERIMENTAL PHYSIOLOGY (CAMBRIDGE, ENGLAND) 1988; 73:931-40. [PMID: 3148961 DOI: 10.1113/expphysiol.1988.sp003227] [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: 01/04/2023]
Abstract
The effect of maternal hyperosmolality as created by an acute mannitol infusion was evaluated in eight chronic sheep preparations. Fetal osmotic and haemodynamic responses were compared to those achieved during an arginine vasopressin (AVP) infusion into the fetus (approximately 400 microU/(min kg]. To assess the AVP sensitivity of the fetal kidney the urine osmolality was determined. The activity of adenylate cyclase was measured in placental cotyledons as an indicator of AVP receptors affecting water permeability. The maternal mannitol infusion induced an increase in fetal serum AVP levels from 1.18 +/- 0.25 up to 13.76 +/- 2.11 pg/ml. During the fetal AVP infusion the AVP levels were approximately 22 pg/ml, somewhat higher when given concurrently with a mannitol infusion to the ewe (peak value: 26.13 +/- 2.80 pg/ml). Fetal heart rate increased significantly during maternal hyperosmolality while this effect was blunted by exogenous AVP given to the fetus. The AVP infusion did not affect fetal or maternal serum osmolality. During the mannitol infusion fetal serum osmolality increased to peak values which were not significantly different whether or not AVP was infused into the fetus (from 298.0 +/- 0.85 to 309.0 +/- 0.90, and from 297.7 +/- 1.47 to 307.9 +/- 0.90 mosmol/kg, respectively). Similarly, there were no differences in the effect of mannitol infusion upon fetal urine osmolality with or without AVP infusion (increments: + 149.7 +/- 34.12 and + 148.7 +/- 31.30 mosmol/kg, respectively). Adenylate cyclase activity in the placenta was unchanged before and after AVP stimulation. The data suggest an unresponsiveness of placental water permeability to fetal AVP infusion. We also conclude that a maximal urine osmolality was reached already at AVP levels obtained after an osmotic maternal load whereas at AVP levels more than twice as high the cardiovascular effects were still AVP dose-dependent.
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530
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Takeda K, Meyer-Lehnert H, Kim JK, Schrier RW. AVP-induced Ca fluxes and contraction of rat glomerular mesangial cells. THE AMERICAN JOURNAL OF PHYSIOLOGY 1988; 255:F142-50. [PMID: 3394807 DOI: 10.1152/ajprenal.1988.255.1.f142] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Arginine vasopressin (AVP) is known to exert Ca mobilization and contraction in glomerular mesangial cells and vascular smooth muscle cells. However, the relationship between changes in intracellular Ca and transmembrane Ca fluxes is not clear at the present time. Therefore, this study was undertaken to determine the effect of AVP on cytosolic calcium ([Ca2+]i) and Ca fluxes as estimated by measurements of 45Ca2+ efflux. Changes of [Ca2+]i in response to AVP were directly measured in monolayers of adherent cultured mesangial cells. AVP induced rapid concentration-dependent increases in [Ca2+]i and Ca2+ efflux. AVP also induced contraction of mesangial cells. This effect was blocked only by the V1 (pressor)-antagonist, d(CH2)5Tyr(Me)AVP. Stimulation of Ca2+ efflux and changes in [Ca2+]i by AVP completely desensitized the mesangial cells to a subsequent identical challenge of AVP with no cross-tachyphylaxis to other hormones. Even in Ca2+-free medium, AVP increased [Ca2+]i and Ca2+ efflux, but to a lesser extent. Under this condition, contraction of mesangial cells induced by AVP was also observed. Readdition of extracellular Ca2+ following the AVP-induced increase in [Ca2+]i caused a second and slower [Ca2+]i increase. In Ca2+-containing conditions, lanthanum ion-reduced AVP evoked [Ca2+]i stimulation to the value observed in Ca2+-free medium. The Ca2+ channel blocker, verapamil, partially inhibited AVP-induced Ca2+ influx but totally blocked the increase in [Ca2+]i induced by high K. Verapamil did not inhibit AVP-stimulated Ca2+ efflux and cell contraction. Dantrolene, a blocker of Ca2+ release from endoplasmic reticulum, inhibited AVP-stimulated Ca2+ efflux and cell contraction.(ABSTRACT TRUNCATED AT 250 WORDS)
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531
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Jun JW, Kim JK. Evaluation of the conformal anomaly of Polyakov's string theory by the stochastic quantization method. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1988; 37:2238-2242. [PMID: 9958928 DOI: 10.1103/physrevd.37.2238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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532
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Chung KS, Han CW, Kim JK, Koh IG. Becchi-Rouet-Stora structure and gauge-invariant actions for higher-spin fields. Int J Clin Exp Med 1988; 37:1079-1082. [PMID: 9958780 DOI: 10.1103/physrevd.37.1079] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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533
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Takeda K, Meyer-Lehnert H, Kim JK, Schrier RW. Effect of angiotensin II on Ca2+ kinetics and contraction in cultured rat glomerular mesangial cells. THE AMERICAN JOURNAL OF PHYSIOLOGY 1988; 254:F254-66. [PMID: 3344808 DOI: 10.1152/ajprenal.1988.254.2.f254] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
This in vitro study was undertaken to determine the changes in Ca2+ kinetics and cell shape of cultured putative glomerular mesangial cells in the rat in response to angiotensin II (ANG II). Intracellular Ca2+ ([Ca2+]i) was measured using quin 2. ANG II-stimulated Ca2+ efflux was also determined. ANG II induced rapid concentration-dependent increases in [Ca2+]i and Ca2+ efflux. ANG II also induced contraction of mesangial cells as assessed by alterations in cell shape. Even in Ca2+-free medium, ANG II increased [Ca2+]i and Ca2+ efflux, but to a lesser extent. Under this condition, contraction of mesangial cells induced by ANG II was also observed. Readdition of extracellular Ca2+ after the ANG II-induced increase in [Ca2+]i caused a second and slower [Ca2+]i increase. High potassium (50 mM) induced a change of [Ca2+]i, but to a lesser extent compared with the ANG II-induced change. The Ca2+ channel blocker verapamil (5 x 10(-5) M) partially inhibited ANG II-induced Ca2+ influx but totally blocked the increase in [Ca2+]i induced by high potassium. Verapamil did not inhibit ANG II-stimulated Ca2+ efflux or the change in cell shape. Dantrolene (10(-4) M), a blocker of Ca2+ release from endoplasmic reticulum, inhibited ANG II-stimulated Ca2+ efflux and change in cell shape. These results indicate that ANG II rapidly increases [Ca2+]i in cultured rat mesangial cells, in part by mobilizing Ca2+ from dantrolene-sensitive intracellular pools and in part through activation of receptor-operated and voltage-dependent Ca2+ channels. The [Ca2+]i mobilization, however, seems to be the primary modulator of initial glomerular mesangial cell contraction.
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534
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Kim CD, Cho TS, Kim JK, Kim WT, Park HL. Spin-orbit coupling effects in CdGa2Se4:Co2+ single crystals. PHYSICAL REVIEW. B, CONDENSED MATTER 1987; 36:9283-9285. [PMID: 9942799 DOI: 10.1103/physrevb.36.9283] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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535
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Schrier RW, Kim JK. Water metabolism in historical perspectives: its research in the past and present. KIDNEY INTERNATIONAL. SUPPLEMENT 1987; 21:S113-6. [PMID: 3306101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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536
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Kim JK, Summer SN, Schrier RW. Cellular action of arginine vasopressin in the isolated renal tubules of hypothyroid rats. THE AMERICAN JOURNAL OF PHYSIOLOGY 1987; 253:F104-10. [PMID: 3037919 DOI: 10.1152/ajprenal.1987.253.1.f104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Hypothyroidism has been demonstrated to be associated with an impaired concentrating capacity and specific morphological changes in the thick ascending limbs. This study was performed to evaluate the cellular action of arginine vasopressin (AVP) in the isolated renal tubules from control (C) and hypothyroid (HT) rats. Hypothyroidism was induced by feeding aminotriazole for 4 wk. Urinary volume was higher in HT rats (C 13.5 +/- 0.9, HT 17.7 +/- 0.9 ml/24 h, P less than 0.005) and urinary osmolality was lower in HT rats (C 1,707 +/- 49, HT 1,229 +/- 35 mosmol/kgH2O, P less than 0.001). Plasma AVP levels were significantly higher in HT rats (C 1.93 +/- 0.59, HT 4.12 +2- 0.62 pg/ml, P less than 0.05), thus documenting AVP resistance. The adenylate cyclase response to AVP (10(-6) M) was significantly lower (P less than 0.02) in the medullary thick ascending limb of Henle's loop (mTALH) in HT (14.3 +/- 2.4 to 41.7 +/- 5.8 fm X 30 min-1 X mm-1, P less than 0.001) than in mTALH in C rats (14.4 +/- 2.8 to 110.1 +/- 24.9 fm X 30 min-1 X mm-1, P less than 0.001). In contrast, the adenylate cyclase response to AVP was not significantly different in collecting tubules of cortex, outer medulla, and inner medulla from C and HT rats, although a slight decrease in response to AVP was observed in cortical and outer medullary collecting tubules.(ABSTRACT TRUNCATED AT 250 WORDS)
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537
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Carlone R, Kim JK, Rathbone M. Purification of a chick brain-derived growth factor by reversed-phase high-performance liquid chromatography. J Neurosci 1987; 7:2163-7. [PMID: 3612235 PMCID: PMC6568927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A chick brain-derived growth factor (CBGF) has been purified to apparent homogeneity by a combination of ultrafiltration, DEAE ion-exchange, and reversed-phase high-performance liquid chromatography on a C18 column. CBGF has an apparent molecular mass of approximately 1500 Da. The amino acid composition of CBGF has been determined and reveals a peptide containing predominantly glycine, glutamic acid/glutamine, and aspartic acid/asparagine. This mitogen is highly active, with half-maximal stimulation of chick brain astrocytes at 5 ng/ml in an assay using incorporation of methyl-3H-thymidine into DNA. In addition to its effects on chick astrocytes, purified CBGF from the 18 d chick embryo is mitogenic for amphibian limb regeneration blastema cells in vitro. A possible role for this mitogen in the nerve-dependent regeneration of amphibian appendages is discussed.
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538
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Yoon CK, Kim JK. [A study on health indicator and health affecting factors]. IN'GU POGON NONJIP = JOURNAL OF POPULATION AND HEALTH STUDIES 1987; 7:89-107. [PMID: 12280807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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539
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540
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Han CW, Han SK, Jun JW, Kim JK, Koh IG. Absence of leading divergence in the parity-odd one-loop amplitude of type-I SO(32) superstring theory. Int J Clin Exp Med 1986; 34:1219-1221. [PMID: 9957275 DOI: 10.1103/physrevd.34.1219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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541
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Kim JK, Summer SN, Erickson AE, Schrier RW. Role of arginine vasopressin in medullary thick ascending limb on maximal urinary concentration. THE AMERICAN JOURNAL OF PHYSIOLOGY 1986; 251:F266-70. [PMID: 3740273 DOI: 10.1152/ajprenal.1986.251.2.f266] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Two groups of Sprague-Dawley rats, Harlan (H) and Charles River (CR), were discovered in that the medullary thick ascending limb (MAL) had a profoundly different adenylate cyclase response to arginine vasopressin (AVP). Using these two groups of rats, we studied the correlation between AVP action on the MAL and maximal urinary concentration. AVP (10(-6) M) significantly stimulated adenylate cyclase in MAL of H rats (7.4 +/- 0.9 to 43.8 +/- 4.6 fmol cAMP formed X 30 min-1 X mm-1, P less than 0.001) but not in CR rats (10.3 +/- 1.4 to 12.7 +/- 2.0 fmol cAMP formed X 30 min-1 X mm-1, NS). In contrast, AVP significantly stimulated adenylate cyclase of cortical, outer and inner medullary collecting tubules from both H and CR rats. Glucagon (10(-6) M) significantly stimulated adenylate cyclase of MAL from both H and CR rats. After 48 h of fluid deprivation, urinary osmolality was significantly higher (P less than 0.001) in the H (4,504 +/- 399 mosmol/kg H2O, n = 14) than CR (2,840 +/- 176 mosmol/kg H2O, n = rats. This observation was not attributable to differences in creatinine clearance (CR, 1.30 +/- 0.24; H, 1.24 +/- 0.03 ml/min, NS, n = 4) or plasma AVP (CR, 12.75 +/- 1.44; H, 12.38 +/- 1.17 pg/ml, NS, n = 6) levels. These results therefore suggest that the action of AVP on the MAL, in addition to the effect on collecting tubules, is involved in maximal urinary concentration in rats.
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542
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Han SK, Kim JK, Koh IG, Tanii Y. Supersymmetrization of N=1 ten-dimensional supergravity with Lorentz Chern-Simons term. Int J Clin Exp Med 1986; 34:553-556. [PMID: 9957174 DOI: 10.1103/physrevd.34.553] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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543
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Qian RL, Chin K, Kim JK, Chin HM, Cone J, Hankins WD. Purification of murine erythropoietin produced in serum-free cultures of erythroleukemia cells. Blood 1986; 68:258-62. [PMID: 3459556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
We previously documented that several erythroleukemia cell lines released factors that stimulated erythropoiesis in vivo and in vitro. A simple five-step scheme has been devised that allows purification of this erythropoietic activity to apparent homogeneity. The methods employed included lectin affinity chromatography (wheat germ agglutinin), gel filtration (ultro gel ACA44), ion exchange, hydroxylapatite, and high performance liquid chromatography. Following polyacrylamide gel electrophoresis, biologic activity was recovered in an area corresponding to a molecular weight of 35,000 daltons. Silver staining of a polyacrylamide gel after electrophoresis of our most purified preparation revealed a single band at 35,000 daltons.
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544
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Hirst W, Johnson MK, Kim JK, Phelps EA, Risse G, Volpe BT. Recognition and recall in amnesics. J Exp Psychol Learn Mem Cogn 1986; 12:445-51. [PMID: 2942628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Although there is considerable agreement that performance in direct memory tasks (e.g., recall, recognition) is more disrupted by amnesia than performance in indirect memory tasks (e.g., mirror reading, word completion), one may be able to further circumscribe the deficit within the domain of direct memory tasks. The present article explores whether recall is disproportionately disrupted by amnesia compared to recognition. If amnesia affects memory uniformly across different direct memory measures, recall of normal controls should not differ from the recall of amnesics when recognition scores of these two groups are equated. On the other hand, if recall is disproportionately disrupted, normal recall should be superior to amnesic recall even when recognition is equated. The present study equated amnesic recognition with that of controls by providing amnesics with 8 s of study time and normal subjects with 0.5 s. Amnesics with Korsakoff's syndrome, amnesics with other etiologies, and appropriate controls were examined. Normal recall was superior to amnesic recall even when no differences were found in recognition. The results further specify the selective nature of amnesia.
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545
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Kim JK, Koh IG, Yoon Y. Calabi-Yau manifolds from arbitrary weighted homogeneous spaces. Int J Clin Exp Med 1986; 33:2893-2895. [PMID: 9956494 DOI: 10.1103/physrevd.33.2893] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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546
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Dillingham MA, Dixon BS, Kim JK, Wilson PD. Effect of trifluoperazine on rabbit cortical collecting tubular response to vasopressin. J Physiol 1986; 372:41-50. [PMID: 3014127 PMCID: PMC1192749 DOI: 10.1113/jphysiol.1986.sp015995] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Anuran membrane studies suggest that the calcium-binding protein calmodulin is necessary for arginine vasopressin (AVP) to exert a hydro-osmotic effect. We therefore examined the effect of trifluoperazine and N-(6-aminohexyl)-5-chloro-1-naphtholene sulphonamide (W-7), chemically dissimilar calmodulin inhibitors, on hydraulic conductivity (Lp) response to AVP in rabbit cortical collecting tubules perfused in vitro. Trifluoperazine but not W-7 increased basal Lp in rabbit cortical collecting tubules. When cortical collecting tubules were pre-treated with either trifluoperazine or W-7, the effect of AVP to increase Lp was significantly inhibited. To determine the site of this inhibition, Lp responses to exogenous cyclic adenosine 3',5'-phosphate (AMP) were studied. Both trifluoperazine and W-7 pretreatment significantly inhibited the effect of a cyclic AMP analogue to increase rabbit cortical collecting tubule Lp. These results suggest that calmodulin may be an important mediator of the hydro-osmotic response to AVP in the mammalian cortical collecting tube by acting at a site or sites distal to cyclic AMP formation.
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547
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Hossain A, Kim JK, Hankins WD. Treatment of a fatal transplantable erythroleukemia by procedures that lower endogenous erythropoietin. J Cell Biochem 1986; 30:311-8. [PMID: 3458710 DOI: 10.1002/jcb.240300404] [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: 01/05/2023]
Abstract
The in vitro growth of primary erythroleukemia cells has been examined in the presence and absence of the hormone erythropoietin (EPO). Although these leukemic cells had previously been considered to be hormone-independent, addition of EPO was found to be essential for maximum growth in culture. Erythroid colonies that grew in the presence of EPO were leukemogenic when returned to mice. Influence of EPO on the in vivo growth of leukemic cells was indicated by our findings that administration of the hormone caused a more severe leukemia and rapid death, and transfusion of red blood cells, which lowers endogenous EPO, led to decreased spleen size and increased survival of leukemic mice. We suggest from our results that hormone-associated therapy might be efficacious in the treatment of this and, perhaps, other leukemias.
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MESH Headings
- Animals
- Blood Transfusion
- Cell Division/drug effects
- Cell Line
- Erythrocyte Transfusion
- Erythropoietin/antagonists & inhibitors
- Erythropoietin/metabolism
- Erythropoietin/pharmacology
- Leukemia, Erythroblastic, Acute/metabolism
- Leukemia, Erythroblastic, Acute/pathology
- Leukemia, Erythroblastic, Acute/therapy
- Mice
- Neoplasm Transplantation
- Neoplasms, Hormone-Dependent/metabolism
- Neoplasms, Hormone-Dependent/pathology
- Neoplasms, Hormone-Dependent/therapy
- Transplantation, Isogeneic
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548
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Kang K, Kim CK, Kim JK. Symmetry breaking and charge operator in SU(9) grand-unification models. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1986; 33:260-272. [PMID: 9956466 DOI: 10.1103/physrevd.33.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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549
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Kim JK, Dillingham MA, Summer SN, Ishikawa S, Anderson RJ, Schrier RW. Effects of vasopressin antagonist on vasopressin binding, adenylate cyclase activation, and water flux. J Clin Invest 1985; 76:1530-5. [PMID: 2997281 PMCID: PMC424121 DOI: 10.1172/jci112133] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
We studied the effect of an arginine vasopressin (AVP) analogue, (1-[beta-mercapto-beta, beta-cyclopentamethylenepropionic acid],2-O-ethyltyrosine, 4-valine)AVP(d[CH2]5Tyr[Et]VAVP), on the stimulation of adenylate cyclase by various hormones in the isolated nephron segments and 3H-AVP binding to renal papillary membranes from the rat. The net water flux across the renal cortical collecting tubules of the rabbit was also examined. We found that d(CH2)5Tyr(Et)VAVP significantly inhibited adenylate cyclase activation by AVP in cortical, medullary, and papillary collecting tubules and in the medullary thick ascending limb. In contrast, the AVP analogue did not alter the stimulation of adenylate cyclase by parathyroid hormone in the cortical thick ascending limb, by glucagon in the medullary thick ascending limb, and by calcitonin in cortical collecting tubules. In addition, d(CH2)5Tyr(Et)VAVP blocked [3H]AVP binding to renal papillary membranes. The enhanced net water transport induced by AVP in isolated, perfused rabbit cortical collecting tubules also was completely blocked by this AVP analogue. These results indicate that d(CH2)5Tyr(Et)VAVP specifically antagonizes the cellular action of AVP on the medullary thick ascending limb and on the cortical, medullary, and papillary collecting tubules. Evidence is also presented for competitive antagonism as the cellular mechanism of action.
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550
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Kim CK, Kim JK. Intermediate mass scale of SU(N) grand unification with nontrivial charge assignment. PHYSICAL REVIEW. D, PARTICLES AND FIELDS 1985; 31:2964-2967. [PMID: 9955615 DOI: 10.1103/physrevd.31.2964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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