No abstract available.
Animals ; Mice* ; Plants, Medicinal* ; Sarcoma 180* ; Sarcoma*

No abstract available.
Animals ; Carcinoma, Hepatocellular* ; Mice*

No abstract available.
Animals ; Linoleic Acid* ; Mice* ; Sarcoma 180* ; Sarcoma*

The purpose of this study is to evaluate the diagnostic accuracy of various quantitative indices for the differentiation of benign from malignant primary soft tissue tumors by FDG-PET. A series of 32 patients with a variety of histologically or clinically confirmed benign (20) or malignant (12) soft tissue lesions were evaluated with emission whole body (5min/bed position) PET after injection of [18F]FDG. Regional 20min transmission scan for the attenuation correction and calculation of SUV was performed in 16 patients (10 benign, 6malignant) followed by dynamic acquisition for 56min. Postinjection transmission scan for the attenuation correction and calculation of SUV was executed in the other 16 patients (10 benign, 6 malignant). The following indices were obtained : the peak and average SUV (pSUV, aSUV) of lesions, tumor-to-background ratio acquired at images of 51 min p.i. (TBR51), tumor-to-background ratio of areas under time-activity curves (TBRarea) and the ratio between the activities of tumor ROI at 51 min p.i. and at the time which background ROI reaches maximum activity on the time-activity curves (T51/Tmax). The pSUV, aSUV, TBR51, and TBRarea, in malignant lesions were significantly higher than those in benign lesions. We set the cut-off values of pSUV, aSUV, TBR51, TBRarea and T51/Tmax for the differentiation of benign and malignant lesions at 3.5, 2.8, 5.1, 4.3 and 1.55, respectively. The sensitivity, specificity and accuracy were 91.7%, 80.0%, 84.4% by pSUV and aSUV, 83.3%, 85.0%, 84.4% by TBR51, 83.3%, 100%, 93.8% by TBRarea and 66.7%, 70.0%, 68.8% by Tsl/Tmax. The time-activity curves did not give additional information compared to SUV or TBR. The one false negative was a case with low-grade fibrosarcoma and all four false positives were cases with inflammatory change on histology. The visual analysis of FDG-PET also detected the metastatic lesions in malignant cases with comparable accuracy. In conclusion, all pSUV, aSUV, TBR51, and TBRarea are useful metabolic semi-quantitative indices with good accuracy for the differentiation of benign from malignant soft-tissue lesions.
Fibrosarcoma ; Humans ; Positron-Emission Tomography ; Sensitivity and Specificity

We evaluated the in vivo kinetics, distribution, and pharmacology of N-(4-[F] fluorornethylbenzyl)spiperone ([F]FMBS), a newly developed derivative of spiperone, as a potentially more selective #radiotrar.er for the dopamine (DA) Dz receptors. Mice received 1.9-3.7 MBq (1.8-3.6 nmol/kg) of [F]FMBS by tail vein injectivn. The time course and regional distribution of the tracer in brain were assessed. Blocking studies were carried out by intravenously preinjecting DA Dp receptor blockers (spiperone, butaclamol) as well as drugs with high affinity for DA Dr lSCH 23390), DA transporter (GBR 12909), and serotonin Sp (5-HTz) (ketanserin) sites. After injection of the tracer, the radioactivity in striatum increased steadily over time, resulting in a striatal-to-cerebellar ratio of 4.8 at 120 min postinjection. By contrast, the radioactivity in cerebellum, frontal cortex, and remaining cortex washed out rapidly. Preinjection of unlabe1ed FMBS (1 rng/kg) and spiperone (1 mg/kg) reduced [F] FMBS striatal-to-cerebellar ratio by 41Zo and 80Ya, respectively. (+)-Butaclamol(1 mg/kg) blocked 80Yo of the striatal [F]FMBS binding, while (-)-butaclamol (1 rng/kg) did not. Preinjection of SCH 23390 (1 mg/kg) and GBR 12909 (5 mg/kg) had no significant effect. On [""F]FMBS binding. Ketanserin (1 mg/kg), a ligand for the 5-H1g receptors, did not cause significant inhibition either in striatum, in frontal cortex, or the remaining cortex. The results demonstrate that [F]FMEtS labels DA Dz receptors selectively in vivo in the mouse brain. It may hold promise as a selective radiotracer for studying DA Dz receptors in vivo by PET.
Animals ; Brain ; Cerebellum ; Dopamine* ; Ketanserin ; Kinetics ; Mice ; Pharmacology ; Radioactivity ; Receptors, Dopamine D2* ; Serotonin ; Spiperone* ; Veins

PURPOSE: N-(3-[18F]Fluoroporpy)-2beta- carbomethoxy-3beta-(4-iodophenyl) nortropane ([18F]FP-CIT) has been shown to be very useful for imaging the dopamine transporter. However, synthesis of this radiotracer is some what troublesome. In this study, we used a new method for the preparation of [18F]FP-CIT to increase radiochemical yield and effective specific activity. MATERIALS AND METHODS: [18F]FP-CIT was prepared by N-alkylation of nor-beta-CIT (2 mg) with 3-bromo-l-[18F]fluoropropane in the presence of Et3N (5-6 drops of DMF/CH3CN, 140 degree C, 20 min). 3-Bromo-l-[18F]fluoropropane was synthesized from 5 microliter of 3-bromo-l-trifluoromethanesulfonyloxypropane (3-bromopropyl -l-triflate) and nBu4N18F at 80 degree C. The final compound was purified by reverse phase HPLC and formulated in 13% ethanol in saline. RESULTS: 3-Bromo-l-[18F]fluoropropane was obtained from 3-bromopropyl-l-triflate and nBu4N18F in 77-80% yield. N-Alkylation of nor-beta-CIT with 3-bromo-l-[18F]fluoropropane was carried out at 140 degree C using acetonitrile containing a small volume of DMF as the solvents. The overall yield of [18F]FP-CIT was 5-10% (decay-corrected) with a radiochemical purity higher than 99% and effective specific activity higher than the one reported in the literature based on their HPLC data. The final [18F]FP-CIT solution had the optimal pH (7.0) and it was pyrogen-free. CONCLUSION:: In this study, 3-bromopropyl-l-triflate was used as the precursor for the [18F]fluorination reaction and new conditions were developed for purification of [18F]FP-CIT by HPLC. We established this new method for the preparation of [18F]FP-CIT, which gave high effective specific activity and relatively good yield.
Chromatography, High Pressure Liquid ; Dopamine Plasma Membrane Transport Proteins* ; Dopamine* ; Ethanol ; Hydrogen-Ion Concentration ; Positron-Emission Tomography ; Solvents

To evaluate the parental concerns for elementary school boys (7-12 yr) on the circumcision, a randomly selected cross-sectional survey was performed in each elementary school from 16 urban wards in Busan. We asked 10,861 parents to answer the questionnaires on the circumcision such as the benefits and fallbacks of circumcision, proper time and knowledge of the surgery, and neonatal circumcison. The overall response rate to the questionnaire was 38.9%. The overall circumcision rate of elementary school boys was 43.2%, which increased from 18.7% at 7 yr old to 64.8% at 12 yr old. The significant reason for and against circumcison was 'hygiene benefits (88.1%)' and 'unreliable medical benefits (38.5%)', respectively. 74.9% of parents thought that elementary school age is the optimal time of circumcision. Only 11.2% of boys were circumcised during neonatal period. The main reason for parents to oppose neonatal circumcision was 'their babies feel pain (35.8%)'. About 50% of parents thought that circumcision will prevent medical diseases. Besides the medical basis, the circumcision is emerging as a kind of social custom in Busan. For parents making the decisions on the circumcision of their boys, physician or health care providers should provide helpful and honest facts about circumcision.
Attitude to Health ; Child ; Circumcision/psychology* ; Cross-Sectional Studies ; Culture ; Health Knowledge, Attitudes, Practice ; Human ; Korea ; Male ; Middle Aged ; Parents/psychology* ; Questionnaires ; Random Allocation ; Religion ; Socioeconomic Factors

No abstract available.
Aging* ; Glucose* ; Metabolism*

Hairy cell leukemia is an uncommon lymphoreticular disorder which primarily involves bone marrow, spleen, and peripheral blood. Patients, mostly men, present with splenomegaly and pancytopenia usually. A 62-year-old man was admitted with an abdominnal mass which had grown slowly for 20 years. On physical examination, an enlarged spleen was palpated without tenderness. An abdominal CT scan showed a diffusely enlarged spleen, which measured 20 cm in greatest dimension. In the peripheral blood, many atypical lymphocytes with abundant, delicate, surface projections were noted. They had tartrate-resistant acid phosphatase(TRAP) activity. Thrombocytopenia (60,000/mm3) was observed in the complete blood counts, Other laboratory data were within normal limits. He underwent splenectomy. The submitted spleen measured 26x15x5 cm and weighed 2150 gm. It was well encapsulated and the outer surface was smooth. Cut surfaces were diffusely dark-red. White and red pulps were indistinct. There was no mass-like lesion. Microscopically, the spleen consisted of monotonous mononulcear cells which involved red pulp. The white pulp was diminished, and could be barely recognized. Cells had small round nuclei and abundant cytoplasm. Ultrastructurally, cells with numerous slender surface projections were noted. In Korea, hairy cell leukemia is exceedingly rare. We report a case of hairy cell leukemia with characteristic pathologic features of spleen as well as those of peripheral blood.
Male ; Humans

Cocaine functions as indirect dopamine and serotonin (5-hydroxytryptamine, 5HT) agonists and induces genomic and behavioral alterations in the striatum. Previously we demonstrated that ritanserin, a 5HT2/1C receptor antagonist, is not responsible for cocaine-induced behavioral alterations and zif268 mRNA gene expression in the striatum (see the previous paper in this issue). In this study, it was hypothesized that dopamine and 5HT2/1C receptors are required for cocaine-induced behavioral alterations and c-fos and zif268 mRNA expression. This hypothesis was addressed by infusing amperozide which antagonizes both 5HT2/1C and dopamine receptors and was analyzed using the quantitative in situ hybridization histochemistry in vivo. Systemic injection of amperozide (5 mg/kg, s.c.) significantly blocked increase in behavior, c-fos and zif268 mRNA expression induced by 15 mg/kg cocaine, i.p., in the dorsal striatum. These data suggest that dopamine and 5HT2/1C receptors are necessary for cocaine-induced behavioral alterations and immediate early gene expression in the dorsal striatum.
Cocaine ; Dopamine ; Gene Expression* ; In Situ Hybridization ; Receptors, Dopamine ; Ritanserin ; RNA, Messenger ; Serotonin