In order to understand the role of mec regulator genes in the evolution of methicillin-resistant S. aureus (MRSA), the distribution of the mec regulator genes among the 66 clinical isolates of MRSA was analysed. And also the correlation between gene mutation and degree of phenotypic expression of resistance was studied. Fifty strains carried whole mec regulator region, while the mecI gene and nearly half of the 3'-end of the mecR#l gene were deleted in fifteen strains. The mecRl MS gene was detected among all of the mecA carried strains, but the mecRl PB gene was carried by 77% of the MRSA strains. At least a portion of the 5'-end region of the mecRl gene was carried by all MRSA strains tested. Forty-seven strains were finally confirmed to have mecI gene and each mecI gene of above strains was sequenced for identification of the relationship between repressor function of mecI gene on mecA transcription and MIC level of methicillin. Point mutations were detected in 11 strains of 47 strains. In 8 strains, there was one nucleotide substitution (C to T at position 202) that produced a new termination codon at position 201. In 3 strains, one nucleotide substitution from G to T at position 43 caused an amino acid substitution from Val to Phe. The MIC of methicillin of strains carrying mutated mecI genes ranged 256 ug/ ml to 1024 ug/ml. Transcription level of amplified cDNA corresponding to mecA was determined by the method of RT-PCR of extracted RNA. Total RNA was extracted from two strains with mutated mecI gene and a strain with intact mecI gene. Deletional loss or the mutational inactivation of the mecI gene did not affect the level of mecA transcription. Role of mecI gene as a strong repressor function on mecA gene seemed to be skeptical.
Amino Acid Substitution ; Codon, Terminator ; DNA, Complementary ; Genes, Regulator* ; Methicillin Resistance ; Methicillin* ; Methicillin-Resistant Staphylococcus aureus ; Point Mutation ; RNA

No abstract available.
Humans ; Stomach Neoplasms* ; Young Adult*

The author surveyed on the ration of central serous retinopathy (C.S.R.) cases among total out patient, distribution of sex, distribution of age, sites of affected eye, and visual acuity in 271 cases of central serous retinopathy from March, 1973 to April, 1977. Fluorescein angiography was performed in 71 cases among them. Leakages of fluorescein were analysed by pictures. The results are obtained as follows: 1. The eyes of C.S.R. were observed in 0.75% among total out patients. 2. As to the distribution of sex, male were observed in 71.4%. 3. Among 271 cases, Unilateral affected cases (83.4%), and there were no difference between right and left eyes. 4. As to the distribution of age, 4-th decade were most frequently affected in 35.4%. 5. The cases were classified by leaking pattern as followings; Type I: Leaking was unremarkable. Type II: Leaking point appeared at early arterial phase and fades out gradually. Type III: Learking point appeared at early arterial phase and increased in density gradually, but the size of leaking area wes not enlarged. Type IVa: Leaking point appeared at early arterial phase and increase concentrically in the density and size. Type IVb: Leaking point appeared at early arterial phase and increased vertically (mushroom-shaped) in its size and density. 6. Type IVa in leaking pattern was most frequently observed. 7. A single leakage was found in 39.5% of all cases. 8. The leakages of fluorescein were found most frequently in the upper area particullary in the upper nasal area of the macula.
Central Serous Chorioretinopathy* ; Fluorescein ; Fluorescein Angiography ; Humans ; Male ; Outpatients ; Visual Acuity

The cytolytic activity of CD4' T cells, both human and murine, has been clearly demonstrated in the immune response to mycobacterial infection and suggested to play a significant role in the protection and immunopathology. However, Uttle is known about the differentiation of CD4' CTL. In order to address this issue, we examined the influences of some factors on the generation of CD4' CTL specific to mycobacterial antigens. After 7 days' stimulation of PBMCs from healthy tuberculin reactors with mycobacterial antigens, the cytolytic activity of purised CD4' T cells toward autologous macrophages infected with mycobacteria was measured by Cr release assay. First, we found that both of live M. tubeiculosis and soluble antigens (ST-CF) induced the cytolytic activity of CD4' T cells, although the inducibility of the former was slightly greater than the latter. Second, the cytolytic activity was maximally induced at the relatively low antigen concentration (0.2:1 bacteria:monocyte ratio or 0.5 mg/ml of ST-CF). Finally, in the presence of increasing amounts of neutralizing anti-IL-12 or anti-IFN-r MoAb, the cytolytic activity of CD4+ T cells was decreased in a dose-dependent manner. These results suggest that low dose of antigen, its particulate type give mycobacteria), IL-12, and IFN-r give some positive signals for the generation of CD4+ CTL.
Humans ; Interleukin-12 ; Macrophages ; T-Lymphocytes* ; Tuberculin

No abstract available.
Hypothyroidism* ; Thyroid Gland*

No abstract available.
Hypothyroidism* ; Thyroid Gland*

BACKGROUND: Dopamine receptors have been regarded as a strong candidate involved in etiology of schizophrenia and a target for various antipsychotic drugs. The purpose of our study was to investigate whether dopamine D1 receptor(DRD1) gene polymorphisms would predict the treatment response to antipsychotics in schizophrenia. METHOD: One hundred thirty-four schizophrenic patients, who met DSM-IV criteria for schizophrenia were entered into a 48-week study. The psychopathology of the patients was assessed at baseline, 12th, 24th, 48th weeks of treatment by PANSS. Responders were defined by a 20% of the reduction in total PAnSS score at end point. The genomic DNA fragment corresponding to nucleotides of dopamine D1 receptor gene was amplified by polymerase chain reaction(PCR). RESULT: Neither allelic frequencies nor genotypes for dopamine D1 receptor differed significantly between responders and non-responders. Also, there was no difference of changes of PANSS scores among three genotype groups of the dopamine D1 receptor. CONCLUSION: Allelic variation in the dopamine D1 gene is not associated with individual differences in antipsychotic response.
Antipsychotic Agents ; Diagnostic and Statistical Manual of Mental Disorders ; DNA ; Dopamine* ; Genotype* ; Humans ; Individuality ; Nucleotides ; Psychopathology ; Receptors, Dopamine ; Receptors, Dopamine D1* ; Schizophrenia

PURPOSE: Obesity is associated with a dysregulation of metabolic balance and is regarded as a low grade chronic inflammation. Western-style diet and physical inactivity are leading causes of obesity. This study examined the profiles of forty plasma cytokines and chemokines at the same time in the early stages of high-fat diet-induced obesity using a mouse model. METHODS: A total of 30 male CD1 mice, 12 ~ 14 weeks of age, were enrolled. The mice were fed a high-fat diet for 6 weeks to induce obesity. The plasma glucose and triglyceride concentrations were measured using a hexokinase colorimetric assay kit and a serum triglyceride determination kit, respectively. The relative levels of multiple cytokines and chemokines in the plasma were determined using a mouse cytokine array kit. RESULTS: The mice exhibited significant weight gain after 6 weeks of a high-fat diet. The genital fat depot was enlarged along with an increase in the number and the mean size of white adipocytes as early as 4 weeks after a high-fat diet. In addition, the plasma glucose and triglyceride levels increased significantly after 4 weeks of a high-fat diet. Cytokine array analysis revealed a remarkable increase in the expression of both CXCL12 and CXCL13, whereas the proinflammatory cytokines remained low after 4 weeks of a high-fat diet. CONCLUSION: A significant increase in plasma levels of CXCL12 and CXCL13 was observed after 4 weeks of a high-fat diet, which might induce the migration of B lymphocytes, T lymphocytes, and monocytes from the blood to expanding adipose tissue or fat associated lymphoid clusters, playing a key role in adipose tissue remodeling and local immunity during the early stages of high-fat diet-induced obesity.
Adipocytes, White ; Adipose Tissue ; Animals ; B-Lymphocytes ; Blood Glucose ; Chemokines ; Cytokines ; Diet ; Diet, High-Fat ; Hexokinase ; Humans ; Inflammation ; Male ; Mice* ; Monocytes ; Obesity* ; Plasma* ; T-Lymphocytes ; Triglycerides ; Weight Gain

The present study was designed to examine the effect of d-amphetamine on CA release from the isolated perfused model of the rat adrenal gland, and to establish its mechanism of action. D- amphetamine (10~100microM), when perfused into an adrenal vein of the rat adrenal gland for 60 min, enhanced the CA secretory responses evoked by ACh (5.32x10-3 M), excess K+ (5.6x10-2 M, a membrane depolarizer), DMPP (10-4 M, a selective neuronal nicotinic Nn-receptor agonist) and McN-A-343 (10-4 M, a selective M1-muscarinic agonist) only for the first period (4 min), although it alone has weak effect on CA secretion. Moreover, d-amphetamine (30microM) in to an adrenal vein for 60 min also augmented the CA release evoked by BAY-K-8644, an activator of the dihydropyridine L-type Ca2+ channels, and cyclopiazonic acid, an inhibitor of cytoplasmic Ca2+ ATPase only for the first period (4 min). However, in the presence of high concentration (500microM), d-amphetamine rather inhibited the CA secretory responses evoked by the above all of secretagogues. Collectively, these experimental results suggest that d-amphetamine at low concentrations enhances the CA secretion from the rat adrenal medulla evoked by cholinergic stimulation (both nicotininc and muscarinic receptors) as well as by membrane depolarization, but at high concentration it rather inhibits them. It seems that d-amphetamine has dual effects as both agonist and antagonist at nicotinic receptors of the isolated perfused rat adrenal medulla, which might be dependent on the concentration. It is also thought that these actions of d-amphetamine are probably relevant to the Ca2+ mobilization through the dihydropyridine L-type Ca2+ channels located on the rat adrenomedullary chromaffin cell membrane and the release of Ca2+ from the cytoplasmic store.
(4-(m-Chlorophenylcarbamoyloxy)-2-butynyl)trimethylammonium Chloride ; 3-Pyridinecarboxylic acid, 1,4-dihydro-2,6-dimethyl-5-nitro-4-(2-(trifluoromethyl)phenyl)-, Methyl ester ; Adrenal Glands ; Adrenal Medulla* ; Amphetamine ; Animals ; Calcium-Transporting ATPases ; Chromaffin Cells ; Cytoplasm ; Dextroamphetamine* ; Dimethylphenylpiperazinium Iodide ; Membranes ; Neurons ; Rats* ; Receptors, Nicotinic ; Veins

To quantify the dynamic changes taking place in the anterior segment, we measured the anterior chamber depth (ACD), lens thickness (LT) and their difference between sexes and age groups in normal eyes using contact ultrasonography and anterior chamber photography. There were 141 women (241 eyes) and 76 men (130 eyes) between the ages of 10 and 70 years. In normal eyes, the lens thickness was increased and the anterior chamber depth was decreased with aging in both sexes. The anterior chamber depth showed an accelerated decrease between the 4th and 5th decades in females and the ratio of anterior chamber depth to axial length was smaller in females than in males after the 5th decade. The results suggested that the prevalence of angle closure glaucoma will be increased in females after middle age.
Adolescent ; Adult ; Aged ; Aging ; Anterior Chamber/anatomy & histology ; Child ; Eye/*anatomy & histology/*growth & development ; Female ; Humans ; Lens, Crystalline/anatomy & histology ; Male ; Middle Aged