301
|
Harris RS, Giovannetti M, Kim BK. Normal ventilatory movement of the right hemidiaphragm studied by ultrasonography and pneumotachography. Radiology 1983; 146:141-4. [PMID: 6849035 DOI: 10.1148/radiology.146.1.6849035] [Citation(s) in RCA: 71] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The ventilatory movement of the right dome of the diaphragm was studied over the range of the inspiratory capacity in 50 healthy adults in the supine position using simultaneous ultrasonography and pneumotachography. Regional differences were found in movement of the hemidiaphragm; there was greater movement of the middle and posterior thirds of the diaphragm than of the anterior third. A significant positive correlation was found between body weight and amount of diaphragm movement. An apparently greater degree of movement of the diaphragm was found in males than females; this may be related to weight. About 64% of diaphragm movement has occurred by the time midinspiratory capacity is reached. These data may help to define normal movement and also to differentiate abnormal from normal diaphragm movement.
Collapse
|
302
|
Moon MS, Kim BK. The influence of severity of angulatory deformity of rat's tibia on spontaneous correction. Int Surg 1982; 67:537-9. [PMID: 7183642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
In order to estimate the spontaneous correctability of tibial deformity, retrocurvature of various degrees in the growing rat tibia was observed roentgenologically at 2 to 3 weekly intervals for eight week periods. The results obtained were: in the retrocurvated rat tibia of groups I, II and III, 11.1 +/- 2.6%, 7.2 +/- 1.7% and 7.4 +/- 1.1% respectively of initial base angle were corrected in observation periods of between 3 to 8 weeks and the correction obtained between 3 to 5 weeks in groups I, II and III were 4.2 +/- 1.3 degrees (65.5%), 4.3 +/- 1.5 degrees (64.2%) and 5.0 +/- 1.3 degrees (67.9%), and between 5 to 8 weeks were 2.2 +/- 0.6 degrees (34.4%), 2.4 +/- 0.5 degrees (35.8%) and 2.7 +/- 0.9 degrees (32.1%), respectively. This study confirms that spontaneous correctability of deformed rat tibia decreased when the deformity is severe, and, irrespective of the severity of initial deformity, more than half of the initial base angles were corrected in an early phase, and remainders later. This fact indicates that the physeal and diaphyseal remodelling process is affected to some degree by the severity of the deformity.
Collapse
|
303
|
Myers TJ, Kim BK, Steiner M, Baldini MG. Platelet-associated complement C3 in immune thrombocytopenic purpura. Blood 1982; 59:1023-8. [PMID: 7042000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Platelet-associated C3 (PA-C3) was measured with a quantitative immunofluorescence assay. With this assay, PA-C3 levels were determined for 78 normal volunteers, 30 patients with immune thrombocytopenic purpura (ITP), and 20 patients with nonimmune thrombocytopenias. Platelet-associated IgG (PA-IgG) levels were also measured with our standard quantitative immunofluorescence assay. All patients with nonimmune thrombocytopenias and ITP in remission had normal PA-C3 levels. Twenty-four patients with active ITP were classified into 3 groups: 9 (38%) with increased PA-IgG and normal PA-C3 levels, 10 (42%) with elevated PA-C3 and PA-IgG levels, and 5 (20%) with increased PA-C3 values only. A direct correlation was found between PA-C3 and PA-IgG levels. PA-IgG levels were higher in the group of patients with elevated PA-C3 levels than in those with normal values. Platelet survival studied showed reduced survival times of 1.5--2.5 days for the 5 patients with elevated PA-C3 levels only. Elevated PA-C3 levels returned to normal in 7 ITP patients whose platelet counts increased in response to corticosteroid therapy or to splenectomy. Therefore, PA-C3 and PA-IgG assays can be used to identify patients with ITP, to follow their response to therapy, and to classify them into immunologic subgroups similar to red cell classification by Coombs' testing in immune hemolytic anemia.
Collapse
|
304
|
Nagasawa H, Kim BK, Steiner M, Baldini MG. Inhibition of thrombin-neutralizing activity of antithrombin III by steroid hormones. Thromb Haemost 1982; 47:157-61. [PMID: 7101236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Estrogens in high doses have been shown to inhibit, in vitro, the thrombin-neutralizing action of antithrombin III (AT III). In this study we investigate the effect of estrogens on AT III in greater detail. To increase the sensitivity of measurement of AT III activity in the absence of heparin, we have developed an assay system utilizing human platelets, AT III and thrombin. The two proteins derived from human plasma were prepared in high purity. Platelet aggregation was induced by approximately 0.02 NIH U of thrombin. AT III was added in amounts that suppressed 95% of the aggregation-inducing effect of thrombin. Estrogens blocked the thrombin-neutralizing effect of AT III in dose-dependent manner. This effect was shown to be specific for AT III. Neither aggregability of platelets nor aggregating effect of thrombin were affected by the steroid hormone. Evidence for binding of estrogen to AT III was obtained from changes in intrinsic fluorescence of AT III. ACtivity of AT III was also reduced in increasing order of effectiveness by cholesterol, cortisone, testosterone and progesterone. Our studies suggest a direct effect of estrogens and other steroids on AT III, altering its specific neutralization of thrombin.
Collapse
|
305
|
Fernandez PG, Sharma JN, Galway AB, Campbell N, Kim BK, Snedden W, Granter-Button S, MacDonald J, Gill V. Potassium conservation with amiloride/hydrochlorothiazide ("Moduret') in thiazide-induced hypokalaemia in hypertension. Curr Med Res Opin 1982; 8:120-7. [PMID: 7049587 DOI: 10.1185/03007998209109767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A double-blind study was carried out in 24 hypertensive patients with thiazide-induced hypokalaemia (serum potassium less than 3.2 mmol/l) to compare the effects of treatment with an amiloride/hydrochlorothiazide combination or hydrochlorothiazide alone. The study was divided into three phases: (i) potassium repletion (Weeks 0 to 4) with oral potassium chloride (40 mmol/day), (ii) stabilization (Weeks 4 to 6) of normokalaemia, and (iii) active drug treatment (Weeks 6 to 14), patients being allocated at random to receive one or other of the two treatments. Dosage was 2 tablets per day of the 5 mg amiloride plus 50 mg hydrochlorothiazide combination or of 50 mg hydrochlorothiazide alone. The results showed that blood pressure control was comparable in both treatment groups but hydrochlorothiazide alone caused a statistically significant reduction in serum potassium levels compared to the drug combination. Apart from 1 patient who developed hypokalaemia on hydrochlorothiazide alone, no other side-effects of treatment were reported.
Collapse
|
306
|
Myers TJ, Kim BK, Steiner M, Baldini MG. Selection of donor platelets for alloimmunized patients using a platelet-associated IgG assay. Blood 1981; 58:444-50. [PMID: 6789839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
A quantitative immunofluorescence platelet-associated immunoglobulins (PA-IgG) assay was used to detect alloimmunity to platelets in 8/12 multitransfused patients and to perform platelet crossmatching in the 8 alloimmunized patients. The correct separation of multitransfused patients into alloimmune and nonalloimmune groups was substantiated with chromium-51-labeled platelet survival studies. For 5 alloimmunized patients, compatible and incompatible donor platelets were demonstrated by PA-IgG crossmatching and were confirmed by platelet survival studies. With the other 3 alloimmunized patients, only studies with 5 of these incompatible donor platelets showed markedly reduced survival times on 4 occasions. PA-Igg compatible donor platelets survived 3.5-8.7 days, while PA-IgG incompatible platelets showed survival times of 0.1-2.4 days. Overall, PA-IgG testing correctly indicated survival results on 15/17 occasions (88%), whereas platelet aggregation, serotonin release, and lymphocytotoxicity testing showed correct predictions for only 41%-59% of the survival studies. PA-IgG testing predicted which times, thus indication patients with platelet-specific alloantibodies. the PA-IgG assay provides a sensitive method to detect platelet alloantibodies and to perform platelet crossmatching, which can complement HLA typing in the selection of donor platelets for alloimmunized patients.
Collapse
|
307
|
Myers TJ, Kim BK, Steiner M, Bishop J, Baldini MG. Detection of platelet alloimmunity with a platelet-associated IgG assay. THE JOURNAL OF LABORATORY AND CLINICAL MEDICINE 1981; 97:854-63. [PMID: 7014743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A quantitative immunofluorescence PA-IgG assay was used to detect alloimmunity to platelets. The assay identified serum alloantibodies in 10 out of 14 multitransfused patients and for two of three infants with neonatal thrombocytopenia. The correct separation of all multitransfused patients into alloimmune and nonalloimmune groups by the PA-IgG assay was substantiated with chromium-51--labeled platelet survival studies. The allogeneic nature of the serum antibodies was demonstrated by progressive absorption of the antibody with increasing numbers of allogeneic platelets but not with autologous platelets. The sensitivity of the PA-IgG assay for detection of serum alloantibodies was superior to that of platelet aggregation, platelet serotonin release, and lymphocytotoxicity testing. In dilution experiments with alloimmune serum, elevated levels of serum PA-IgG could still be detected on donor platelets when platelet aggregation and serotonin release tests became negative. Platelet survival studies with selected platelets performed in the 10 alloimmunized, multitransfused patients confirmed the results of the PA-IgG assays, predicting alloimmunity to the donor platelets. In contrast, platelet aggregation, platelet serotonin release, and lymphocytotoxicity testing indicated alloimmunity for 50% or less of the patients. Reduced platelet survival times were also seen with HLA A- and HLA B-matched donor platelets when donor-recipient incompatibility was demonstrated by the PA-IgG assay. Thus the PA-IgG assay provides a sensitive method to detect serum platelet alloantibodies and may offer a technique in platelet crossmatching.
Collapse
|
308
|
|
309
|
|
310
|
Kim BK, Steiner M, Baldini MG. Response of cyclic nucleotides to stimulation by prostaglandin E1 and 5-hydroxytryptamine in stored human platelets. Thromb Res 1980; 17:873-84. [PMID: 6250244 DOI: 10.1016/0049-3848(80)90252-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
311
|
Nagasawa T, Kim BK, Baldini MG. Temporary suppression of circulating antiplatelet alloantibodies by the massive infusion of fresh, stored, or lyophilized platelets. Transfusion 1978; 18:429-35. [PMID: 684793 DOI: 10.1046/j.1537-2995.1978.18478251236.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Survival of 51Cr-labeled allogenic platelets was repeatedly measured in rabbits previously sensitized by weekly intradermal injections of platelets from donor animals. When values of recovery and survival time were reduced to very low levels, a massive infusion of platelets from randomly selected donor rabbits was given and survival study was repeated. A large increase in platelet survival and recovery was seen in every experiment. Similar results, although of lesser magnitude, were obtained with the infusion of platelets made nonviable by prolonged storage and, also, of lyophilized platelets. A significant increase in life span and recovery of allogenic platelets was also observed in two patients with thrombocytopenia due to aplastic anemia, severely allosensitized to platelets. After one massive infusion of viable or of nonviable platelets, survival and hemostatic effectiveness of subsequently infused allogenic platelets was greatly improved in both patients. Experimental blockade of the RES and titration of the serum alloantibody by the 14C-serotonin release method demonstrated that the favorable effect of the massive platelet infusions was due to the temporary adsorption of the alloantibody in the circulation of the sensitized animals. This two-step procedure of one massive infusion of viable, nonviable or lyophilized allogenic platelets followed by a small infusion of freshly collected platelets may be of practical value in arresting hemorrhage in selected thrombocytopenic patients refractory to all types of available donor platelets because of severe and complex alloimmunization.
Collapse
|
312
|
Abstract
A fluorometric method for the analysis of methyldopa, based on the formation of a fluorophore after oxidation and rearrangement, is described. The drug is isolated from biological fluids by adsorption on alumina and elution with an organic solvent. Fluoresence is linear from 0.1 to 1.5 microgram of methyldopa/ml. The assay has a lower limit of sensitivity of 100 ng/ml and is suitable for pharmacokinetic studies following therapeutic doses in animals and humans.
Collapse
|
313
|
Abstract
Prolonged, probably indefinite storage of viable and functional human platelets is now possible by freezing with dimethylsulfoxide (DMSO). These platelets have a nearly normal survival upon reinfusion and are capable of sustained hemostatic effectiveness in thrombocytopenic patients. Adaptation of the freezing technique for large-scale usage has more recently been achieved. The method is mainly based on the following principles: (1) use of plasma for suspension of the platelet concentrate; (2) gradual addition (0.5% every 2 min) of DMSO to a final concentration of 5% and its gradual removal; (3) a slow cooling rate of about 1 degree C per min and rapid thawing (in 1 min); (4) use of a polyolefin plastic bag for freezing; (5) a washing medium of 20% plasma in Hanks' balanced salt solution; (6) final resuspension of the platelets in 50% plasma in Hanks' solution.
Collapse
|
314
|
Baldini MG, Steiner M, Kim BK. Permeability changes in the plasma and granular membrane of stored platelets. Their prevention for improved platelet preservation. Transfusion 1976; 16:17-9. [PMID: 175531 DOI: 10.1046/j.1537-2995.1976.16176130830.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
315
|
Peress NS, Kim BK. Profound muscle weakness associated with axis cylinder ballooning. A case report. Acta Neuropathol 1974; 28:87-92. [PMID: 4853888 DOI: 10.1007/bf00687522] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
316
|
Kim BK, Baldini MG. The platelet response to hypotonic shock. Its value as an indicator of platelet viability after storage. Transfusion 1974; 14:130-8. [PMID: 12731585 DOI: 10.1111/j.1537-2995.1974.tb04504.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The nature of the platelet response to osmotic shock and its relationship to platelet viability were studied. Light absorbancy changes of human platelet concentrates exposed to hypotonic shock were measured in a spectrophotometer: a sudden drop of light absorbancy was followed by a reversal of light absorbancy towards normal (reversal reaction). It was confirmed that the reversal reaction is a complex phenomenon dependent on the integrity of biochemical and enzymatic functions of the platelets. It was suppressed by glycolytic inhibitors and by SH-blocking agents. Ouabain had no immediate effect, but with prolonged incubation it depressed the reaction. Suspension of the platelets in a protein-free medium caused a rapid loss of the reversal reaction. Disappearance of the marginal bundle of microtubules by exposure to colchicine did not change the reaction leading to the hypothesis that microfibrils rather than the microtubules may have been responsible for the reversal reaction. The conclusion was derived that the reversal reaction is due to cell volume contraction for which integrity of the platelet contractile protein and energy availability are essential. Platelet storage at 4 degrees C or at 22 degrees C caused a progressive depression of the reversal reaction which was more severe in platelets preserved at 4 C than in those preserved at 22 degrees C, and paralleled the loss of the platelet capacity to survive in vivo. Cryoprotective agents (DMSO, DMAC and glycerol) partially inhibited the reversal reaction. Freezing with these agents caused a more severe depression of the reaction. The least depression was observed with 5 per cent DMSO. The results demonstrated that the reversal reaction is a valid and accurate in vitro indicator of in vivo platelet viability when the results to be compared are limited to a single method of storage. Usefulness of the reversal reaction is reduced when results obtained with different methods of storage are compared.
Collapse
|
317
|
Kim BK, Baldini MG. Biochemistry, function, and hemostatic effectiveness of frozen human platelets. PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE. SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE (NEW YORK, N.Y.) 1974; 145:830-5. [PMID: 4818597 DOI: 10.3181/00379727-145-37904] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
318
|
Kim BK, Baldini MG. Preservation of viable platelets by freezing. Effect of plastic containers. PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE. SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE (NEW YORK, N.Y.) 1973; 142:345-50. [PMID: 4683257 DOI: 10.3181/00379727-142-37019] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
319
|
Kim BK, Baldini MG. Glycolytic intermediates and adenine nucleotides of human platelets. II. Effect of short-term storage at 4 C. Transfusion 1972; 12:1-8. [PMID: 4621594 DOI: 10.1111/j.1537-2995.1972.tb00014.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
320
|
Kelleher WJ, Kim BK, Schwarting AE. Production of lysergic acid derivatives in submerged culture. V. Effect of surfactants on alkaloid accumulation. LLOYDIA 1969; 32:327-33. [PMID: 5356035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
321
|
Lee JT, Kim BK, Kim IH. A Case of Cardiac Arrest due to Oculoeardiac Reflex: A Case Report. Korean J Anesthesiol 1969. [DOI: 10.4097/kjae.1969.2.1.91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
322
|
Sheen MR, Kim BK, Parks RE. Purine nucleoside phosphorylase from human erythrocytes. 3. Inhibition by the inosine analog formycin B of the isolated enzyme and of nucleoside metabolism in intact erythrocytes and sarcoma 180 cells. Mol Pharmacol 1968; 4:293-9. [PMID: 5661774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
|
323
|
Kim BK, Cha S, Parks RE. Purine nucleoside phosphorylase from human erythroyctes. II. Kinetic analysis and substrate-binding studies. J Biol Chem 1968; 243:1771-6. [PMID: 5651329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
|
324
|
Kim BK, Cha S, Parks RE. Purine nucleoside phosphorylase from human erythrocytes. I. Purification and properties. J Biol Chem 1968; 243:1763-70. [PMID: 5651328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
|
325
|
|