No abstract available.

No Abstract Available.
Keratomileusis, Laser In Situ*

BACKGROUND: Tumor necrosis factor-alpha(TNF-alpha) has been thought to play a major role in neurological injury during global brain ischemia and subsequent reperfusion following resuscitation in cardiac arrest. So, we hypothesized that the elevation in TNF-alpha was dependent upon the duration of the global brain ischemia, and related to delayed neuronal damage. METHODS: Fourteen rats were divided two groups ; 1 minute-cardiac arrest group(n=7) and 3 minute-cardiac arrest group(n=7). we induced cardiac arrest by chest compression and damping of tracheal tube for 1 minute and 3 minutes respectively. And then, resuscitation was initiated. To measure the plasma activity of TNF-alpha, blood samples were drawn before and at the end of cardiac arrest, and 30, 60, 90, and 120 minutes after initiation reperfusion. At 72 hours after resuscitation, the ND(neurologic deficit) score was determined and the histopathologic outcome of hippocampal CA1 neuron was observed by the percent dead hippocampal CA1 neurons. RESULTS: 1. TNF-alpha level during the early reperfusion period(<2h) was significantly increased in 3 min-cardiac arrest group compared with 1 min-cardiac arrest group(p=0.0001). 2. There was a no significant difference of neurologic deficit score between 1 min- and 3 min-cardiac arrest. 3. Percent dead hippocampal neurons were significantly increased in 3 min-cardiac arrest group compared with 1 min-cardiac arrest group(9.1+/-1.2% vs 1.2+/-0.9%, p<0.05). CONCLUSION: The results suggest that longer duration of global brain ischemia causes a more profound increase in plasma TNF-alpha level during the early reperfusion period(<2h) and more delayed neuronal damage than lessor duration of global brain ischemia, and that increase in TNF-alpha level during the early reperfusion period(<2h) is related to delayed neuronal damage.
Animals ; Brain Ischemia ; Brain* ; Heart Arrest* ; Heart Arrest, Induced ; Necrosis ; Neurologic Manifestations ; Neurons ; Plasma ; Rats* ; Reperfusion ; Reperfusion Injury* ; Resuscitation ; Thorax ; Tumor Necrosis Factor-alpha*

No abstract available.
Animals ; Capsaicin* ; Colon* ; Cytokines* ; Lung* ; Melanoma, Experimental* ; Mice* ; RNA, Messenger*

BACKGROUND: Chronic exposure to ultraviolet radiation(UVE) nduces photoaging characterized by dry, deeply wrinkled, inelastic, leathery, and irregulaity pigmented skin. UVR also induces solar keratosis and carcinoma, and is a contributing factor in melanoma. Sunscreens are used to prevent solar damage to skin and, if used on a daily lass should significantly reduce the incidence of the chronie photodamaging events. OBJECTIVE: We tried to evaulate the photoaging effects of UVR in the skin and the photoprotective effect of sunscreens. METHOD: We examined the gross and microscopic changes skin of albino hairless Skh : HR-1 mice exposed chronically to ultraviolet B(UVB) and suncreen-treated mice. RESULTS: The skin of the UVB-irradiated mouse shows chear, cteristic signs of photoaging, such as deep wrinkles across the back, and thickened and a hery skin. Histologically, the photoaged skin shows increased epidermal thickness, numeross fibroblasts and inflammatory cell infiltration in the upper dermis, and many enlarged keratering cysts in the lower dermis. By the 20th week, seven of the total of 9 mice(78%) in UVB irradiated mice developed at least one tumor. Histologically, the tumor is a papilloma, but the he are many dyskeratotic cells and loss of polarity in epidermis. Octyl methoxycinnamate or TiO ZnO Talc-treated mic show a significantly decreased wrinkling score, mimmal epidermal hyperplasia, slightly increased dermal cellularity, and lack of proliferation of cysts. The octyl dimethyl PABA-treatd mice shows significantly increased wrinkling score and marked inflammatory infiltration dermis. By the 20th week, only one mouse had developed a tumor in the octyl methoxy irmamate-treated group and no evidence of tumor was seen in the TiO ZnO Talc-treated group. In the octyl dimethyl PABA-treated group, five of 7 mice(71%) developed at least one tumor. CONCLUSION: The skin which is chronically exposed to UVB is subject to photoaging and photocarcinogenesis and regular use of an adequate sunscreen would prevent these photodamaging effects of UVB.
Animals ; Dermis ; Epidermis ; Fibroblasts ; Hyperplasia ; Incidence ; Keratosis ; Melanoma ; Mice ; Mice, Hairless ; Papilloma ; Skin* ; Sunscreening Agents*

This study was carried out to investigate the ultrastructural findings of rats after administration of 0.5% lead acetate with drinking water. The Sprague-Dawley rats were divided into control and experimental groups. The control group was composed of 12 rats and was orally administered with 0.5% sodium acetate. The experimental group was composed of 36 rats and orally administered with 0.5% lead acetate. Two rats in the control group and four rats in the experimental group were sacrificed on day 2, and week 1, 2, 4, 6 and 8 after administration. The kidney was extirpated and examined by electron microscopy. The results obtained were as follows: The blood lead concentration in the experimental group began to increase from the second day after administration and it increased gradually until the 6th week and it decreased at the 8 week. The urinary excretion of delta-ALA also increased from the secondary and gradually increased up to the 8th week. On electron microscopic examination, the proximal tubular cells showed fat droplets, dilatation of the endoplasmic reticulum, mitochondrial swelling, increased numbers of secondary lysosomes and myelin figure-like residual bodies and intranuclear inclusion bodies. All these findings peaked at the eighth week after administration. Ultrastructural findings after Timm sulphide silver reaction revealed the lead granules in the proximal tubular lumen and between the microvilli of the proximal tubular cells without membrane-bounded. It can be concluded that most of the changes of micro-organelles are compatible with degenerative changes of lead exposure and passive diffusion of lead granules are involved in the proximal tubular cells.
Rats ; Animals

No abstract available.
Humans ; Lung Neoplasms* ; Lung* ; Survival Analysis*

BACKGROUND: In recent years, lymphocyte subset analysis in peripheral blood is widely performed using erythrocytes-lysed whole blood and two color immunofluorescence/flow cytometry method. Use of fresh blood drawn within 6 hours of staining is recommended, and some patients have to revisit the hospital for blood collection. We tested whether 24 hours-refrigerated/stored whose blood can be used for lymphocyte subset analysis. METHODS: Twenty consecutive blood samples from patients (including nine HIV positive patients) collected in EDTA-vacutainer were tested: 1) on the day of sampling using fresh blood kept at room temperature for up to 6 hours until staining (as recommended by the manufacturer) and 2) on the following day using the same tube of blood refrigerated for 24 hours after the first staining. Two colon immunofluorescenc staining was done using Simultest(TM) IMK-Lymphocyte kit (Beckon Dickinson, U.S.A.) and flow cytometric analysis was performed using FACScan and SimulSET(TM) software (Becton Dickinson, U.S.A.). Results of alive kinds of Lymphocyte subsets (CD3+, CDl9+, CD3+CD4+CD3+CD8+, CD3-CDl6+ and/or CD56+) on day 1 and day 2 were compared by pained-t test and Wilcoxon signed rank test. RESULTS: There was no significant change of values for all of the lymphocyte subsets except CD3+CD8+suppressor/cytotoxic (S/C) T cells. There was a slight but statistically significant change in S/C T cells (39.9%-->41.8%: 1.9%, p=0.008) after 24 hours of refrigeration, and this change was observed mainly in HIV-positive patient group. However, there was no significant change in the absolute count of helper/inducer T cells or CD4/CD8 ratio, and the change of S/C T cells in these patients was not considered to be of clinical significance. CONCLUSIONS: The difference in the values of lymphocyte subsets between fresh blood and 24 hours-refrigerated blood was negligible and it is concluded that 24 hours-stored blood samples can be used for lymphocyte subset analysis for clinical purposes.
Colon ; HIV ; Humans ; Lymphocyte Subsets* ; Lymphocytes* ; Refrigeration ; T-Lymphocytes

A tender, non-healing ulcer of 3 months' duration developed on the tongue tip of a 51-year-old male with active pulmonary tuberculosis. Acid-fast bacilli were grown in the tissue and sputum cultures. The patient was anergic to PPD skin test before the treatment and IL-2 productivity was significantly decreased. Sections from the tongue tip showed ulceration, infiltration of neutrophils and tuberculoid granulornas accompanying caseation necroses in the dermis. The ulcer healed after administration of anti-tuberculosis medication for 2 months.
Dermis ; Efficiency ; Humans ; Interleukin-2 ; Male ; Middle Aged ; Necrosis ; Neutrophils ; Skin Tests ; Sputum ; Tongue* ; Tuberculosis* ; Tuberculosis, Pulmonary ; Ulcer

In recent years there has been an increase in the number of outpatient surgical procedures performed using local anesthesia with intravenous sedation. However, many patients are reluctant to undergo surgery because of their concerns about pain and pain-awareness during the operation. We performed a study to evaluate the effectiveness and safety of midazolam during outpatient surgical procedures. Between March 1997 and December 1998, 50 patients were anesthetized with bolus intravenous injection of 0.1mg/kg of midazolam, followed by local anesthesia. The blood pressure, pulse and oximeter values were monitored. There was no significant change of arterial oxygen saturation. Midazolam induced antegrade amnesia in most cases. All patients except three (94%) said they would willingly choose this anesthetic technique again. Major complications were not noted. We concluded that midazolam is a good sedative agent in providing favorable antegrade amnesia, as well as reduced anxiety and fear of pain during surgical procedures. This suggests that midazolam may be used routinely in outpatient surgical procedures. Monitoring of oxygen saturation, however is essential in preventing severe hypoxia during procedures.
Amnesia ; Anesthesia, Local* ; Anoxia ; Anxiety ; Blood Pressure ; Humans ; Injections, Intravenous ; Methods ; Midazolam* ; Outpatients ; Oxygen