The objective of the present study was to identify the characteristics of phospholipase C (PLC) isozymes purified from bovine brain and to investigate their interrelationship with G protein. The purified PLC isozymes β, γ and δ were obtained and the characteristics of PLC activity on various concentrations of free Ca²⁺ were observed. The activity of PLC was increased with increasing Ca²⁺ concentration and the activity PLC δ was increased higher in the presence of phosphatidyl choline (PC) than in the absence of PC. For vesicle formation as the structure of cell membrane, cholic acid and deoxycholic acid as detergent on phosphatidylinositol bisphosphate (PIP₂) substrate containing PC were used, and then the activity of PLC isozymes were increased with increasing concentration of cholate, from 0.2% to 1% and were increased slightly in deoxycholate. In the PIP₂ containing phospholipid and glycolipid as brain extract, the activity of PLC isozymes were checked in 0.2-1% cholic acid. The activities of PLC isozymes were continuously increased up to 1% cholic acid. The quantitation of PLC isozymes from several bovine organs by radioimmunoassay was made. Brain was the most sufficient organ in terms of amount of PLC β and δ. A large amount of PLC δ was existed in adrenal gland. The binding capacity of GTPrS and G protein was observed and other observations of the binding effect of GTPrS-G protein and PLC monoclonal Ab-Protein A from tissue homogenate with PLC were made. From the observation the binding capacity was revealed the range of 0.11-1.49%. The effects of each type of G protein on the percent activity of purified PLC isozymes were observed. From the observation, activities of isozymes were increased in Goa & Gmix, and the activities of PLC β and δ were increased in Gβγ and Gia. Activities of PLC β and γ were decreased in Gta but PLC δ increased.
Adrenal Glands ; Brain* ; Cell Membrane ; Cholates ; Cholic Acid ; Choline ; Deoxycholic Acid ; Detergents ; GTP-Binding Proteins* ; Isoenzymes ; Phosphatidylinositols ; Phospholipases* ; Radioimmunoassay ; Type C Phospholipases*

No abstract available.
Humans ; Motor Vehicles*

To obtain the basic data of prognosis of acute carbon monoxide (CO) intoxication, one hundred and sixteen cases of CO intoxication defined by carboxyhemoglobin (COHb) and admitted via emergency room of Yeungnam University Hospital from Oct. '85 to April' 89 have been clinically analyzed and evaluated, including delayed postanoxic encephalopathy (DPE) and the following results were obtained. 1. The ratio of male to female was 1:1.5 and mental state was drowsy mostly (26.2% of 116 cases) 2. The more disturbed the mental state, the more decreased was the arterial pH and PaCO₂, which may be the result of metabolic acidosis. 3. The early laboratory findings in patients of CO intoxication were as follows: leukocytosis-65.5%, increase of hematocrit-23.3%, hyperglycemia-19.8%, increase of GPT-19.8% increase of creatinine-0.9% and glucosuria-12.1%. 4. The early findings of EKG were abnormal in 35.3%: change of rhythm-25.0%, abnormal ST segment 15.5% (change of rhythm and abnormal ST segment-5.2%) but the conduction disorder was not present. 5. The abnormal EEG above mild degree was 93.1%, of which moderate was most frequent (80.2%). 6. The incidence of DPE was 7.8% among all admitted CO patients. DPE cases had long duration of exposure time (8 hours), severe leukocytosis (20,000) and an abnormal EEG (MA).
Acidosis ; Blood Gas Analysis ; Brain Diseases ; Carbon Monoxide* ; Carbon* ; Carboxyhemoglobin ; Clinical Study* ; Electrocardiography ; Electroencephalography ; Emergency Service, Hospital ; Female ; Humans ; Hydrogen-Ion Concentration ; Incidence ; Leukocytosis ; Male ; Prognosis

Driving restrction for people with seizure disorder is intended to ensure the public's safety, but such resrictions may unduly harm the welfare of many people with seizures. There is a trend toward greater liberalization of driving standards for people with seizure disorder. The present survey indicates the current driving status of 194 male patients which were managed at the Yeungnam University Hospital from Jan. 1994 to JarL 1995. The result was as follows: 33% of the epileptic patients held traffic licences, 21% actually driving, 5% holding the licences and driving the truck and bus commercially; 72% of the patients took licences after onset of the disease, 29% disclosed by traffic authorities due to their military services; Over the half of the patients had complex partial seizure, 68% was seizure-free over one year, 91 % had no history of trabbic accident. Our traffic road regulations prohibited driving cars by epileptic patients, but practically the authorities permitted epileptic patients to drive cars case by case according to the medical certifications which were issued by the physician. In conclusion, we insist that new traffic road regulation, medical standards for permission and regulation, medico-legal- administrative committee, and thorough detection and regular follow-up of the patients were essential for safety of patients and other peoples.
Certification ; Epilepsy ; Follow-Up Studies ; Humans ; Male ; Military Personnel ; Motor Vehicles ; Seizures ; Social Control, Formal

Wilson's disease is a genetically transmitted autosomal recessive disorder of copper metabolism which affects the liver. Brain and other organs. The seizure in Wilson's disease is not infrequent but. It's report is very rare in Korea. The frequency of seizure is about 10 times more than that of general population The statistical proportions of types of seizure associated with Wilson's disease do not differ significantly from that seen in the general population. And the most common seizure type is focal motor form. The issue of the mechanisms producing seizure in Wilson's disease has attracted controversy, but the cause of seizure seems to be related with copper itself. Although the seizure is well controlled by anticonvulsants, the prognosis of seizure depends on the treatment of Wilson`s disease. We report a case of Wilson's disease associated with somatomotor status epilepticus.
Anticonvulsants ; Brain ; Copper ; Hepatolenticular Degeneration* ; Korea ; Liver ; Metabolism ; Prognosis ; Seizures ; Status Epilepticus

Primary malignant melaomatosis of leptomeninges is uncommon, not reported in the Korea to this time. Primary melanomatosis of leptomeninges are not associated with any specific clinical or radiological symptoms. The diagnosis was made by ultrastructural demonstration of malignant melanoma cells from CSF. The patient is 23 years male, who has had meningeal irritating symptoms such as intermittent headache. Nausea, vomiting and disturbed consciousness. Brain CT and MRI showed no mass lesion but cytology of cerebrospinal fluid revealed malignant melanoma cells. There was no evidence of extracerebral melanoma.
Brain ; Cerebrospinal Fluid ; Consciousness ; Diagnosis ; Headache ; Humans ; Korea ; Magnetic Resonance Imaging ; Male ; Melanoma ; Nausea ; Vomiting

In Patients subject to convulsions the attacks occur sporadically, and the factors reponsible for precipitation of a seizure at any given time are usually unknown. In a small number of patients certain sensory stimuli may consistently initiate an attack. The sensory modality involved varies in different patients: however, the entire group has been referred to by the term 'reflex epilepsy.' In certain rare instances, listening to music produces seizures and this subdivision of reflex epilepsy has been called "musicogenic epilepsy". By the Critchley, in 1937, several particular types of musical stimuli were reported, but frequency of such stmuli was much rare and there has been no report yet in Korea. This 40 years old fernale patient revealed a ternporal lobe seizure, which appeared whenever listened to old korean popular songs. The etiology was not known and the response to anti-epileptic drugs was good.
Adult ; Epilepsy, Reflex* ; Humans ; Korea ; Music ; Seizures

Nerve conduction studies help delineate the extent and distribution of the neural lesion. The nerve conduction was studied on upper (median, ulnar and radial nerves) and lower (personal, posterior tibial and sural nerves) extremities in 83 healthy subjects 23 to 66 years of age, and normal values were established (Table 1). The mean motor terminal latency (TL): median, 3.6 (±0.6) milliseconds; ulnar, 2.9 (±0.5) milliseconds; radial nerve, 2.3 (±0.4) milliseconds. Mean motor nerve conduction velocity (MNCV) along distal and proximal segments: median, 61.2 (±9.1) (W-E) and 57.8 (±13.2) (E-Ax) meters per second; ulnar, 63.7 (±9.1) (W-E) and 50.6 (±10.0) meters per second. Mean sensory nerve conduction velocity (SNCV): median, 34.7 (±6.7) (F-W), 63.7 (±7.1) (W-E) and 62.8 (±12.3) (E-Ax) meters per second; ulnar, 38.0 (±6.7) (F-W), 63.4 (±7.5) (W-E) and 57.0 (±10.1) (E-Ax) meters per second; radial, 45.3 (±6.8) (F-W) and 64.2 (±11.0) (W-E) meters per second; sural nerve, 43.4 (±6.1) meters per second. The amplitudes of action potential and H-reflex were also standardized. Mean H latency was 28.4 (±3.2) milliseconds. And, the fundamental principles, several factors altering the rate of nerve conduction and clinical application of nerve stimulation techniques were reviewed.
Action Potentials ; Adult* ; Extremities ; H-Reflex ; Healthy Volunteers ; Humans ; Neural Conduction* ; Radial Nerve ; Reference Values ; Sural Nerve

The diagnosis of OPCA could be made clinically with important aid of brain CT scanning, although the definite and conclusive diagnosis only by postmortem pathological determination. We reviewed, clinically and with brain CT examination, 12 cases of patients with OPCA who were admitted to the Yeungnam University Hospital for a recent 5 years. The result were as following: 1. The distribution of age is from 49 to 72, mainly 50 to 60. Man is more frequent than women at the 4.5 times. 2. The interval period from Sx. Onset to diagnosis is 1 year to 6 years. 3. The usual initial Sxs. Were dizziness (58%), ataxia (33%), and other less frequent Sxs. Were weakness of low extremities, dysarthria, headache and urinary incontinence. The clinical manifestations at the initial diagnosis were cerebellar disturbance (100%), dysarthria (83%), and increased deep tendon reflexes (58%). 4. The results of brain CT finding are like this: the width of cerebellar sulci is more than 1mm, other 4 cases more than 2mm. the width of cerebellar pontine cistern of the patient if usually 3 to 4mm, other 2 cases extended to the 5 mm. the A. P and lateral lengths of 4th. ventricle is 4 mm and 4 to 8 mm respectively. 6 cases of whole patients show coincidentally cerebral atrophy.
Ataxia ; Atrophy ; Brain ; Clinical Study* ; Diagnosis ; Dizziness ; Dysarthria ; Extremities ; Female ; Headache ; Humans ; Olivopontocerebellar Atrophies* ; Reflex, Stretch ; Tomography, X-Ray Computed ; Urinary Incontinence

Stroke in young adults are relatively uncommon. To investigate the causes, clinical findings and prognosis of cerebral infarction (CI), intracerebral hemorrhage (ICH), and subarachnoid hemorrhage (SAH) in young patients, we reviewed the medical records of 103 young patients(age: 15-45 years) who had been admitted to Yeungnam University'Hospital from Jan. 1986 to Dec. 1990. The proportion ol young adults was 6.1% in all cerebrovascular disease patients in our hospital during the same period. The mean age was 36.38 +/- 7.27 years. About two third of the patients were older than 35 years old. The ratio of male to female patients was 1.39 to 1. The percentage of patients with ICH was 45.6%, CI, 37.9%, and SAH, 16.5%. The causes of cerebral infarction were atherosclerosis (38.4%), cardiogenic cause (28.2%), nonatherosclero tic vasculopathy (10.3%), and hematologic abnormality (7.7%) in order of frequency, and the most involoved site was the carotid territories (79.4%). The major causes of intracerebral hemorrhage were hypertension (59.6%) and arteriovenous malformation (8.5%). The locations of the hematoma on brain CT scan were the basal ganglia (42 : 5%), lobe (34%), thalamus (8.5%), pons (6.4%) and ventricle (4.3%) in that order of frequency. Subarachnoid hemorrhage was mainly due to ruptured aneurysm (76.4%). Undetermined causes noted in 15 cases (14.6%). The overall mortality of this group of patients was 23.3%. Most of the patients (83.3%) with fatal outcome died within the first 2 weeks. The degree of neurologic sequelae among survivors was mild (45.6%) to moderate (22.3%).
Adult ; Aneurysm, Ruptured ; Arteriovenous Malformations ; Atherosclerosis ; Basal Ganglia ; Brain ; Cerebral Hemorrhage ; Cerebral Infarction ; Fatal Outcome ; Female ; Hematoma ; Humans ; Hypertension ; Male ; Medical Records ; Mortality ; Pons ; Prognosis* ; Stroke* ; Subarachnoid Hemorrhage ; Survivors ; Thalamus ; Tics ; Tomography, X-Ray Computed ; Young Adult*