No abstract available.
Alcoholics* ; Depression* ; Humans

BACKGROUND: The circadian rhythm of circulating melatonin is regulated by the endogenous oscillators, the suprachi-asmatic nuclei, and entrained by the light-dark cycle of the environment, but it seems that the rhythm can be affected by variable lesions outside the retina-pineal pathway. We intended to know how acute cerebral infarction affects on the cir-cadian rhythm of plasma melatonin secretion. METHODS: Plasma melatonin level was measured from 64 patients with acute cerebral infarction. On admission, blood samples were collected by venipuncture at 2AM, 4AM, 10AM, and 2PM and melatonin level was measured by radioimmunoassay. The state of consciousness of each patient was assessed clini-cally and the infarction site and size were evaluated clinically and radiographically. RESULTS: Among 64 patients with acute cerebral infarction, dramatic blunting or obliteration of nocturnal melatonin surge in the blood was found in 29 patients. The circadian rhythm of melatonin secretion was absent in 12 of 35 alert patients, in 10 of 20 drowsy patients, and in 5 of 7 stuporous patients. Melatonin secretion into plasma was markedly decreased in all 2 comatose patients. Of 14 patients with brainstem lesions, 8 patients showed decreased melatonin levels with the absence of a nocturnal rise, although most of them were alert. CONCLUSIONS: This study suggests that brainstem and the initial mental state might contribute to the regulation of the circadian rhythm of plasma melatonin even though the lesion does not involve the retina-pineal pathway, but further extensive study is required to elucidate it. (J Korean Neurol Assoc 19(4):359~363, 2001)
Biological Clocks ; Brain Stem ; Cerebral Infarction* ; Circadian Rhythm* ; Coma ; Consciousness ; Humans ; Infarction ; Melatonin* ; Phlebotomy ; Photoperiod ; Pineal Gland ; Plasma ; Radioimmunoassay ; Stupor

Moyamoya disease is characterized by a bilateral progressive narrowing of the distal internal carotid and proximal portions of the anterior and middle cerebral arteries. The cerebral vessels of the 11 to 14 mm embryonic period are extremely similar to these moyamoya vessels. The vertebral arteries unite with a contralateral homologue to form the basilar artery during embryonic development and rarely, the failure of complete fusion results in duplication of these arteries. It is well known that moyamoya disease sometimes is accompanied by persistent primitive arteries, cerebral aneurysm, or rarely arteriovenous malformation. However, no case of the moyamoya disease with complete duplication of basilar artery has been previously reported. These two types of vascular abnormality are probably associated in certain developmental period, and moyamoya disease causes hemodynamic load in the basilar artery system as a collateral pathway and these effects are also involved in duplication of basilar artery. The relationship between these two varieties of vascular abnormality and possible pathogenesis of the moyamoya disease are discussed.
Aneurysm ; Arteries ; Arteriovenous Malformations ; Basilar Artery* ; Cerebral Arteries ; Embryonic Development ; Female ; Hemodynamics ; Middle Cerebral Artery ; Moyamoya Disease* ; Pregnancy ; Vertebral Artery

The cumulative incidence of breast cancer in Korea is low, being about one-fifth of that in the United States. This low incidence has been mainly explained by environmental factors, and recently, however, racial variations in the disease-causing genes should also be considered. The BRCA1 is one of the common genes involved in early-onset breast cancer and/or ovarian cancer in the United States and Northern Europe. However, the involvement of BRCA1 in Korean'breast cancer patients are still unclear. We performed germline mutation screening of the BRCA1 gene by DNA single strand conformation polymorphism (SSCP) analysis. We examined 27 breast cancer patients who were diagnosed less than 35 years by age including two cases with family history of breast cancer. Our study showed no germline mutation at the exons 2, 11 and 20, which were known as the supreme susceptible regions of BRCA1 mutations. Even though our cases did not fulfilled the criteria of familial breast/ovarian cancer, the proprotion of families who inherit the mutated BRCA1 allele seems to be very small and might be negligible among Korean population. Therefore, it is considered that the BRCA1 itself cannot be a major susceptibility gene and the contributions of other genes might be important for the breast cancer.
Alleles ; Breast Neoplasms* ; Breast* ; DNA ; Europe ; Exons ; Genes, BRCA1 ; Germ-Line Mutation* ; Humans ; Incidence ; Korea ; Mass Screening ; Ovarian Neoplasms ; United States

Hepatitis C virus (HCV) E2 protein is known to be one of putative envelope proteins. To develop a sensitive detection method for HCV infected tissues and cells, monoclonal antibodys (MAbs) to the E2 protein of HCV were prepared from mice immunized with recombinant baculovirus-expressing E2 protein (Bac-E2). Several hybridoma clones secreting various levels of MAb were isolated and isotypes of these MAb were determined. One clone (L.2.3.3) was used for ascites production and the E2-MAb was purified and characterized. The L.2.3.3 reacted well with both Bac-E2 and E. coli expressed glutathione-5-transferase-E2 (GST-E2) fusion proteins. Using HCV patient sera, E2 envelope protein was found to be localized in the cell membrane boundary both in CHO cells and insect cells which express HCV E2 protein. Similar result was obtained when same cells were treated with the MAb L.2.3.3. These results demonstrated that Bac-E2 protein is capable of eliciting high titer antibody production in mice.
Animals ; Antibody Formation ; Ascites ; Cell Membrane ; CHO Cells ; Clone Cells ; Cricetinae ; Hepacivirus* ; Hepatitis C* ; Hepatitis* ; Humans ; Hybridomas ; Insects ; Mice

This study aimed 1) at determining the seasonal pattern of the first onset and 2) at examining different demographic and clinical factors by the seasonality of first onset, for shizophrenia, mood disorder and subtypes of each diagnosis. Finally, the 52 subjects with paranoid schizophrenia were selected from all patients who fulfilled DSM-IV criteria far schizophrenia who had been admitted to the National Seoul Mental Hospital from March 1994 to February 1995. And the 44 subjects with bipolar I disorder were selected from all patients who fulfilled DSM-IV criteria for mood disorder who had been admitted to the hospital from March 1994 to February 1996. This study was done by reviewing the hospital records about season of the first outset, demographic factors(sex, age, occupation, educated period, religion, marital status, residence and socioeconomic status) and clinical factors(age at the first onset, duration of illness, family history, length of admission, frequency of admission and treatment result). The seasonal pattern of the first onset and the different demographic and clinical factors by the season of the first onset in paranoid shizophrenia and I disorder were analyzed. The results were as follows: 1) There was no significant seasonal variation of the first onset for paranoid schizophrenia. 2) There was a significant seasonal variation of the first onset with a maximum in spring for bipolar I disorder. 3) There was no significant seasonal variation of the first onset in case of bipolar I disorder that began with the manic episode. 4) There was nonsignificant seasonal tendency to peak in spring/summer in the case of the first manic episode for bipolar I disorder. 5) There were no significant differences in demographic and clinical factors by the season of the first onset for paranoid schizophrenia and bipolar I disorder.
Diagnosis ; Diagnostic and Statistical Manual of Mental Disorders ; Hospital Records ; Hospitals, Psychiatric ; Humans ; Marital Status ; Mood Disorders* ; Occupations ; Schizophrenia* ; Schizophrenia, Paranoid* ; Seasons ; Seoul

No abstract available.
Mycobacterium chelonae* ; Mycobacterium* ; Skin*

The search for a new flap with minimal donor morbidity has been pursued by many plastic surgeons. Numerous donor sites available for microsurgical composite tissue transplantation have been described owing to the tremendous advances made in the field of microsurgery. To be suifable for use as a free flap, a sizable vessel must be included within the tissue, leading to significant donor morbidity. There have been studies for prefabrication of an axial pattern flap in an effort to create a new flap, but most of these methods relied solely on revascularization of a preexisting composite tissue. Our experiment, using an isolated femoral artery and vein as the main pedicle, led to formation of a capsule flap through a normal foreign body reaction between 2 silastic sheet implants. On this induced capsule flap, a skin graft was performed and a total of 40 axial pattern capsulo-cutaneous flaps from 20 Sprague-Dawley rats were successfully obtained after nearly 12 weeks through 4 stages of experiment, including a delay procedure at the second stage. Pathology revealed neovascularization, and abundantly impregnated vascular structures near the pedicle were observed along with random pattern collagen fibers. The skin graft took 100% on this newlyformed axial pattern capsular flap and thus implied that the capsule structure was able to survive on it`s own and was able to support skin grafts. This new flap using only the isolated artery and vein structure can be induced according to various needs with minimal donor morbidity.
Arteries ; Collagen ; Femoral Artery ; Foreign-Body Reaction ; Free Tissue Flaps ; Humans ; Microsurgery ; Pathology ; Rats, Sprague-Dawley ; Skin ; Tissue Donors ; Tissue Transplantation ; Transplants ; Veins

No abstract available.
Carcinoma, Basal Cell* ; Photochemotherapy*

No abstract available.
Pemphigus