The N protein of the rinderpest virus (RPV) was analyzed topologically and antigenically by using anti-N monoclonal antibodies (Mabs). Ten Mabs were raised against the N protein of the RPV. At least six non-overlapping antigenic sites (sites A-F) were delineated by competitive binding assays using biotinylated Mabs. Of them 5 sites (A, C, D, E and F) on the N protein were recognized by RPV-specific Mabs in ELISA and IFA while site B was recognized by Mabs reacting with both RPV and PPRV. Non- reciprocal competition was found among sites C, D and E. Recombinant RPV N protein after exposure to 0.2% SDS exhibited higher ELISA titers in all Mabs recognizing 6 sites. Four sites (A, B, E and F) on 2% SDS-treated N protein lost completely reactivity with Mabs while the remaining sites (C and D) on the protein retained their antigenicity to some degree. It indicates that two sites (C and D) were sequential. Six representative Mabs bound to each site exhibited competition with rinderpest antibodies in a blocking ELISA, indicating that the sites were actively involved in antigenicity in cattle.
Antibodies, Monoclonal/*immunology ; Antigens, Viral/chemistry/*immunology ; Binding, Competitive ; Enzyme-Linked Immunosorbent Assay ; Epitopes/immunology ; Nucleocapsid Proteins/chemistry/*immunology ; Rinderpest virus/*immunology

The Japanese encephalitis virus (JEV) is one of causative agents of reproductive failure in pregnant sows. An indirect enzyme-linked immunosorbent assay (I-ELISA) was examined for its potential use in the rapid monitoring of the JEV, and the results were compared with those from the hemagglutination inhibition (HI) and serum neutralization (SN) tests. The comparative analysis showed that the results of I-ELISA showed a significant correlation with the conventional HI (r = 0.867) and SN tests (r = 0.804), respectively. When the I-ELISA results were compared with the traditional diagnostic assays, the sensitivity of the I-ELISA was 94.3% with the HI test and 93.7% with the SN test, respectively. The specificity was found to be 81.4% and 80.0% with the HI and SN tests, respectively. To determine the applicability of I-ELISA in the field, the serum samples from 720 pigs were collected from 4 regions in Korea between July and August 2004. The results indicated that 21.7% of screened pigs were seropositive for the JEV. The seropositive rates of JEV in the 4 provinces were 12.6% in Gyeonggi, 45.0% in Gyeongnam, 16.7% in Jeonbuk, and 12.2% in Jeju. The I-ELISA methodology developed in this study was shown to have considerable sensitivity and specificity through a comparison with HI and the SN tests. Therefore, it might be one of convenient methods for screening a large number of samples in various fields.
Animals ; Antibodies, Viral/blood ; Antigens, Viral/immunology ; Encephalitis Virus, Japanese/immunology/*isolation&purification ; Encephalitis, Japanese/blood/immunology/*veterinary/virology ; Enzyme-Linked Immunosorbent Assay/methods/*veterinary ; Female ; Hemagglutination Inhibition Tests/veterinary ; Korea ; Neutralization Tests/veterinary ; Swine ; Swine Diseases/blood/immunology/*virology

In this study, we developed a novel tool for purifying two mycotoxins, aflatoxin B1 (AFB1) and zearalenone (ZEN), in feed. This system utilized monoclonal antibodies (mAbs) against AFB1 and ZEN, and magnetic nanoparticles (MNPs). Among ten MNPs with different diameters and functional groups, a 100-nm diameter MNP (fMA) conjugated to an amine group (-NH2) was found to be optimum for coupling with mAbs. The optimal mAb concentrations for coupling to the fMA along with mycotoxin purification capacities of the fMA-mAb conjugates (fMA-AFB1 and fMA-ZEN) were determined. A comparison of mean recovery rates (from corn and product X feed) between the fMA-mAb conjugates and immunoaffinity columns (IAC-AFB1 and IAC-ZEN) showed that the rate for fMA-AFB1 (90~92% and 81~88%) was higher (p > 0.05) than that of IAC-AFB1 (81~84% and 72~78%) for AFB1 (5, 10, 15 ng/mL), and the rate for fMA-ZEN (99~100% and 92~94%) was significantly higher (p < 0.01) than that of IAC-ZEN (86~88% and 81~88%) for ZEN (10, 25, 50 ng/mL) except at a concentration of 10 ng/mL, demonstrating the remarkable purification efficiency of the novel fMA-mAb method. Additionally, mycotoxin purification was much faster using our novel method (approx. 5 min) than the IAC-based technique (> 30 min). This study suggests that the novel purification system we developed would be a useful tool for monitoring and regulating mycotoxin contamination in feed, and replace IAC methods.
Aflatoxin B1 ; Antibodies, Monoclonal ; Magnetics ; Magnets ; Mycotoxins ; Nanoparticles ; Zea mays ; Zearalenone

PURPOSE: Pancreacticoduodenectomy is the procedure of choice for managing periampullary malignancy. But pancreatojejunostomy site leakage is a very critical complication because it is hard to prevent leakage. The aim of this study is to analyze the risk factors of pancreatic leakage after pancreaticoduodenectomy. METHODS: We retrospectively reviewed 172 consecutive patients who had received pancreaticoduodenectomy at Inha University Hospital between Apr. 1996 and Mar. 2006. We analyzed the pancreatic leakage rates according to the clinical characteristics, the pathologic and laboratory findings and the anastomosis methods. RESULTS: There were differences in the mean age and pathologic findings between the two groups. There were 115 (66.9%) patients older than 60 years, while the other 57 patients (33.1%) were younger than 60 years. The incidence of developing pancreatic fistula in patients older than 60 years was 21.7% (25/115) while this was 8.8% (5/57) for the younger patients, and the difference was significant (p=0.03). The patients with a dilated pancreatic duct showed a lower rate of esser post-operative pancreatic fistula than the patients with a non-dilated duct (p=0.001). Other factors, including the anastomosis method and the pathologic diagnosis, didn't show any statistical difference. According to the pathologic diagnosis, the patients with pancreatitis and stomach cancer revealed pancreatic fistula to a smaller extent; there were 6 cases (3.5%) of pancreatitis and 22(12.8%) of stomach cancer. Among the case with pancreatic fistula, there were 0 cases of pancreatitis and 2 cases (6,7%) of stomach cancer, but the difference was not statistically significant. CONCLUSION: Our study demonstrated that pancreatic fistula is related to age and a dilated pancreatic duct. Surgeon must take these risk factors into consideration when performing pancreaticoduodenectomy. We recommend surgeons to use skillful technique to prevent pancreatic fistula.
Diagnosis ; Humans ; Incidence ; Pancreatic Ducts ; Pancreatic Fistula* ; Pancreaticoduodenectomy* ; Pancreaticojejunostomy ; Pancreatitis ; Retrospective Studies ; Risk Factors* ; Stomach Neoplasms

BACKGROUND/AIMS: The incidence of Hepatitis B has significantly declined since the introduction of an HBV vaccination program. The aim of this study was to investigate recent clinical features of acute viral hepatitis B (AVH-B) in Korea. METHODS: A total of 2241 patients with acute viral hepatitis were enrolled and their data were collected from nine medical-centers between January 2006 and December 2009. RESULTS: One hundred nineteen (5.3%) of the 2241 were diagnosed as AVH-B. Among 78 patients with AVH-B whose data were analyzed, 50 were male, and the mean age was 38.6 years. In an initial test, mean AST, ALT and total-bilirubin levels were 1296.2 IU/L, 2109.6 IU/L and 9.3 mg/dl, respectively. Positivity frequencies for HBeAg and anti-HBe were 55.1% and 67.9%, respectively, and the mean HBV DNA level was 5.2 log10 copies/ml. The mean length of hospitalization was 11.6 days. During follow-up, AST, ALT and total bilirubin levels were normalized or near-normalized in all patients without serious complications. Sixty-three of 66 (95.4%) patients showed HBsAg loss and 37 (56.1%) patients showed HBsAg seroconversion. Only 3 patients (4.5%) showed persistent hepatitis B viremia. There was no case of death or liver transplantation. Nine patients (11.3%) had received anti-viral agents and their clinical outcomes were not significantly different from those of patients treated without antiviral agents. CONCLUSIONS: The prevalence of AVH-B among acute hepatitis patients is relatively low in Korea. AVH-B infection can be cured without complications in almost all patients, regardless of antiviral treatment.
Acute Disease ; Adult ; Alanine Transaminase/blood ; Antiviral Agents/therapeutic use ; Aspartate Aminotransferases/blood ; Bilirubin/blood ; DNA, Viral/analysis ; Female ; Hepatitis B/*diagnosis/drug therapy/epidemiology ; Hepatitis B Antibodies/blood ; Hepatitis B e Antigens/blood/immunology ; Humans ; Male ; Middle Aged ; Retrospective Studies

Molecular investigations have provided evidence of the involvement of multiple genetic alterations in gastric carcinogenesis. Regarding the clinical, epidemiological and genetic aspects, well and poorly differentiated gastric adenocarcinoma exhibit some differences.(1) PURPOSE: To examine the gene expression profile of stomach cancer and evaluate the differentially expressed genes between intestinal and diffuse cancer type. METHODS: Five intestinal and 5 diffuse type gastric cancer tissues and their matched normal mucosa were obtained from patients who underwent a gastrectomy. The mRNAs frome these tissues were extracted, reverse transcribed with simultaneous Cy3 and Cy5 labeling, and hybridized with the MAGIC(TM) microarray (Korean 4.6k chip). The chip was scanned using Generation III, image analysis with Imagine 5.0 and data analysis with Arraytool, R, and SAM. RESULTS: Twelve and 15 genes were found to be up- and down-regulated genes in the intestinal type, whereas these figures were 25 and 4 genes in the diffuse type, respectively. With the intestinal and diffuse type, 2 and 9, 10 and 4 exhibites up- and down-regulation greater than 2 fold, respectively. In the intestinal type genes, up-regulation was associated with metabolism, cell growth and cell communication; whereas, down-regulation was associated with metabolism and mainly unclassified functions. In the diffuse type genes, up-regulation was associated with metabolism, cell growth, cell communication and drug resistance, ; whereas, down-regulation was associated with metabolism and cell growth. Non-hierarchical clustering of the genes revealed two expression profiles, which can be used to classify the above 10 samples into two exactly distinct types. CONCLUSION: The analysis of the intestinal and diffuse gastric cancers using the cDNA microarray showed distinct gene expression profiles, consistent with their different histological and clinical features.
Adenocarcinoma ; Carcinogenesis ; Cell Communication ; DNA, Complementary* ; Down-Regulation ; Drug Resistance ; Gastrectomy ; Gene Expression* ; Humans ; Metabolism ; Mucous Membrane ; Oligonucleotide Array Sequence Analysis* ; RNA, Messenger ; Statistics as Topic ; Stomach Neoplasms* ; Transcriptome ; Up-Regulation

No abstract available.
Antiviral Agents/therapeutic use ; Ascites/diagnosis/prevention & control/therapy ; Cholagogues and Choleretics/therapeutic use ; Fatty Liver/diagnosis/diet therapy ; Fatty Liver, Alcoholic/diagnosis/drug therapy ; Hemorrhage/prevention & control/therapy ; Hepatic Encephalopathy/diagnosis/prevention & control/therapy ; Hepatitis B, Chronic/diagnosis/drug therapy ; Hepatitis C, Chronic/diagnosis/drug therapy ; Humans ; Liver Cirrhosis/*diagnosis/drug therapy/pathology/*therapy ; Liver Cirrhosis, Biliary/drug therapy ; Vasodilator Agents/therapeutic use

Purpose: Alpha-fetoprotein (AFP) is a prognostic marker for hepatocellular carcinoma (HCC). We investigated the prognostic value of AFP levels in patients who achieved complete response (CR) to transarterial chemoembolization (TACE) for HCC. Materials and Methods: Between 2005 and 2018, 890 patients with HCC who achieved a CR to TACE were recruited. An AFP responder was defined as a patient who showed elevated levels of AFP (>10 ng/mL) during TACE, but showed normalization or a >50% reduction in AFP levels after achieving a CR. Results: Among the recruited patients, 569 (63.9%) with naïve HCC and 321 (36.1%) with recurrent HCC after complete resection were treated. Before TACE, 305 (34.3%) patients had multiple tumors, 219 (24.6%) had a maximal tumor size >3 cm, and 22 (2.5%) had portal vein tumor thrombosis. The median AFP level after achieving a CR was 6.36 ng/mL. After a CR, 473 (53.1%) patients experienced recurrence, and 417 (46.9%) died [median progression-free survival (PFS) and overall survival (OS) of 16.3 and 62.8 months, respectively]. High AFP levels at CR (>20 ng/mL) were independently associated with a shorter PFS [hazard ratio (HR)=1.403] and OS (HR=1.284), together with tumor multiplicity at TACE (HR=1.518 and 1.666, respectively). AFP non-responders at CR (76.2%, n=359 of 471) showed a shorter PFS (median 10.5 months vs. 15.5 months, HR=1.375) and OS (median 41.4 months vs. 61.8 months, HR=1.424) than AFP responders (all p=0.001). Conclusion High AFP levels and AFP non-responders were independently associated with poor outcomes after TACE. AFP holds clinical implications for detailed risk stratification upon achieving a CR after TACE.