BACKGROUNR/AIMS: Heterogeneity of liver cell populations within the hepatic lobules can affect xenobiotic reaction. In this study, we attempt to clarify the stereological distribution of the y-GTP positive foci in hepatic lobule initiated by diethylnitrosamine and promoted by phenobarbital. METHODS/METERIALS: To the five Sprague-Dawley rats, one day after birth, diethylnitrosamine (0.15 pmole/pn) was intraperitoneally injected and by the weaning at four weeks of life, 0.035% phenobarbital in drinking water was fed for four weeks, at which time the rats were sacrified to obtain the livers. Livers were fixed in fresh cold ethanol acetic acid. Ihe 200 cotmecutive tissue sections were stained by histochemistry for y-GIP and countastained with toluidine blue ar HkE. Employing Zeiss microprojector, y-GTP foci wae traced. And then the largest cross-sectian (size class: 65-165 pm in diameter) of 52 y-GTP foci were selected. Using microscopic grid, distances fiom center of y-GlP foci to nearest centtal vein and bile ductule was measured. As a control group, out of 52 random points determined by rareken digit table, the distances were measured by the same romr. RESULT: the diameter Aom the central points of y-GIP positive foci to the neatest bile ductules was measured as 0.234620+0.14899mm (mean+SD) and the diameter from random points to the neatest bile ductules was measured as 0.303080+0.19582mm (mean+SD). Y-GTP positive foci located within 0.3mm diameter fram bile ductules were counted as 73.1% of 52 foci, whereas that of random points were only 55.8%. Accoring to Aequency table analysis by Shapiro-Wilk W test, there was significant difference by W-value (0.812065) and p-value (0.0144866). CONCLUSION: Stereologically, y -GTP positive foci initiated by diethylnitros;unine, promoted by phaxkarbital in neonatal Spague-Dawley rats were non-rarxlanly distributed in peripcetal atea (Rappaport zone I) in hepatic lobule during hepatocarcinogenesis.
Acetic Acid ; Animals ; Bile ; Diethylnitrosamine ; Drinking Water ; Ethanol ; Liver* ; Parturition ; Phenobarbital ; Population Characteristics ; Rats* ; Rats, Sprague-Dawley* ; Tolonium Chloride ; Veins ; Weaning

No abstract available.
Intussusception* ; Peutz-Jeghers Syndrome*

In removable partial dentures, abutment teeth are essential for support, maintenance, and stability of partial dentures, and are an important factor in the fabrication of functional dentures. If the number of periodontally sound abutments is sufficient and they are located on both sides, it will be easy to manufacture functional dentures with good support, maintenance, and stability. But on the contrary, if the number of teeth is insufficient or if they are located on one side, it is biomechanically disadvantageous and relatively difficult to make functional denture. On the other hand, recently, implant-supported removable dentures, which reinforce the three elements of maintenance, support, and stability by using implant surveyed crown, have been frequently selected as treatment plans.In particular, by adding an implant surveyed crown when only a small number of residual teeth remain, mastication efficiency, esthetics, patient comfort, and pronunciation can be improved. In this case, bilateral posterior extension partial denture was fabricated using implant surveyed crown as abutments by placing implants in the premolars area opposite to the residual tooth unilaterally in the mandible. As a result, the asymmetry of the abutment was resolved, and the maintenance and stability of the denture was achieved.

No abstract available.
Animals ; Autoradiography ; Carcinogenesis* ; Diethylnitrosamine ; gamma-Glutamyltransferase* ; Liver* ; Rats*

No abstract available.
Animals ; Autoradiography ; Carcinogenesis* ; Diethylnitrosamine ; gamma-Glutamyltransferase* ; Liver* ; Rats*

BACKGROUND: The thalamus has multiple connections with areas of the cerebral cortex involved in arousal and cognition. Thalamic damage has been reported to be associated with variable neuropsychological dysfunctions and dementia. This study investigates the changes of regional cerebral blood flow (rCBF) by using SPM analysis of 99mTc-ECD SPECT and examining the neuropsychological abnormalities of 4 patients with anterior thalamic infarctions. METHODS: Four patients with left anterior thalamic infarctions and eleven normal controls were evaluated. K-MMSE and the Seoul Neuropsychological Screening Battery were performed within 2 days after stroke. The normalized SPECT data of 4 patients were compared to those of 11 controls for the detection of areas with decreased rCBF by SPM analysis. RESULTS: All 4 patients showed anterograde amnesia in their verbal memory, which was not improved by recognition. Dysexecutive features were occasionally present, such as decreased word fluency and impaired Stroop test results. SPM analysis revealed decreased rCBF in the left supramarginal gyrus, the superior temporal gyrus, the middle and inferior frontal gyrus, the medial dorsal and anterior nucleus of the left thalamus. CONCLUSIONS: The changes of rCBF in patients with left anterior thalamic infarctions may be due to the remote suppression on metabolism by the interruption of the cortico-subcortial circuit, which connects the anterior thalamic nucleus and various cortical areas. The executive dysfunction and dysnomia may be caused by the left dorsolateral frontal dysfunction of the thalamocortical circuit. Anterograde amnesia with storage deficit may be caused by the disruption of mamillothalamic tract.
Amnesia, Anterograde ; Anomia ; Arousal ; Cerebral Cortex ; Cognition ; Dementia ; Humans ; Infarction* ; Mass Screening ; Memory ; Metabolism ; Seoul ; Stroke ; Stroop Test ; Thalamus ; Tomography, Emission-Computed, Single-Photon*

Malignant mixed mullerian tumor (MMMT) is rare and has pathologically carcinoma and sarcoma components. Among them, primary peritoneal MMMTs are extremely rare, and their proper treatment and prognosis are not well-known. We experienced a case of primary peritoneal origin MMMT, so we report it with a brief review of the literatures.
Peritoneum ; Prognosis ; Sarcoma

Tuberculosis (TB), caused by Mycobacterium tuberculosis (Mtb), remains one of the most important infectious diseases worldwide. Mtb and its culture filtrates or sonic extracts induce apoptosis in macrophages. However, there is a little known about Mtb components that modulate apoptosis and their regulating mechanism. We identified Rv0753c protein with apoptotic potential through searching the biologic active proteins from the multidimensional fractions of Mtb culture filtrate. Here, we investigated the apoptotic effects of Rv0753c on RAW264.7 cells. The recombinant Rv0753c induced RAW264.7 cells apoptosis in a caspase-9-dependent manner. Dissipation of the mitochondrial transmembrane potential (ΔΨ m ), mitochondrial translocation of Bax, and release of cytochrome c from mitochondria were observed in macrophages treated with Rv0753c. Enhanced reactive oxygen species (ROS) production was required for Rv0753c-mediated apoptosis. Furthermore, ROS-mediated JNK activation was major signaling pathway for Rv0753c-induced apoptosis. Moreover, Rv0753c-mediated apoptosis is dependent on TLR4. Altogether, these results suggest that Rv0753c induce apoptosis through ROS-JNK signaling pathway in RAW264.7 cells.

Background and Purpose: Elevation of serum cardiac troponin T (cTnT) is regarded as a specific marker of acute coronary syndrome. Serum cTnT can be increased in patients with acute ischemic stroke, but its clinical implications remain unclear. The aim of this study was to identify the relationships between elevated cTnT and stroke severity, location, and prognosis. Methods: From January 2005 to December 2006, this study recruited 455 consecutive patients who were admitted to Kangbuk Samsung Hospital due to acute ischemic stroke within 3 days of onset, which was confirmed by diffusion magnetic resonance imaging. A total of 416 patients was finally included and divided into 2 groups: an elevated cTnT group (n=45) and a normal cTnT group (n=371). The short-term prognosis was assessed by 30-day modified Rankin Scale responder analysis was compared between the two groups. Results: Serum cTnT was elevated in 10.8% of cases, with elevated cTnT associated with greater stroke severity, as assessed by the National Institutes of Health Stroke Scale score, Insular-lobe involvement was more common in patients with elevated cTnT than in the normal cTnT group. Short-term prognosis was more unfavorable in the elevated cTnT group than in the normal cTnT group. Multivariate regression analysis indicated that elevated cTnT was independently related to insular involvement, cardioembolism, and unfavorable outcome. Conclusions: Elevated cTnT in acute ischemic stroke was associated with severe neurological deficits at stroke onset and damages to the insular lobe. The outcome of acute ischemic stroke was worse for patients with elevated cTnT than for those with normal cTnT. The pathomechanism underlying acute ischemic stroke and subclinical myocardial damage warrants further study.
Acute Coronary Syndrome ; Diffusion Magnetic Resonance Imaging ; Humans ; National Institutes of Health (U.S.) ; Prognosis ; Stroke ; Troponin ; Troponin T

Hepatocellular carcinoma (HCC) is the 2nd most common cause of cancer related death in Korea and well-known malignancy with poor prognosis. Sorafenib is the first-line molecular targeted agent in patients with extra-hepatic spread of HCC. However, complete response is extremely rare in patients treated with sorafenib and the disease control rate is only 43%. We report a 53-year-old man with advanced HCC with pulmonary metastasis who showed complete response by cytotoxic chemotherapy with doxorubicin and cisplatin with relatively tolerable adverse effects after failure of treatment with sorafenib.
Carcinoma, Hepatocellular* ; Cisplatin ; Doxorubicin ; Drug Therapy* ; Humans ; Korea ; Middle Aged ; Neoplasm Metastasis* ; Prognosis