Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0019158 (hepatitis)
 30,205 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The effects of anti-cytokinetic drugs on virus production, formation of syncytia, cell surface changes and lysosomal damage were examined during mouse hepatitis virus 3 (MHV-3) infection of mouse peritoneal macrophages. Colchicine and vinblastine caused no detectable effect on the infectious process. In the presence of cytochalasin B the acute, highly cytopathogenic interaction that MHV-3 establishes with macrophages was converted into one which persisted for several days. Under these conditions the cell surface changes induced by the infection were maintained unaltered but cell fusion was reduced and no significant lysosomal damage was detectable.
J Gen Virol 1982 Nov
PMID:Influence of the cytoskeleton on the expression of a mouse hepatitis virus (MHV-3) in peritoneal macrophages: acute and persistent infection. 629 27

Two plaque-size variants of the neurotropic JHM strain of mouse hepatitis virus have been isolated from the virus stock after eight serial passages in suckling mouse brain. One variant, JHM-DL, produces large plaques, while the other, JHM-DS, produces small plaques in tissue culture. DS replicates more slowly, has a lower virus yield in vitro, and is less virulent for mice than DL. They also differ in their pathogenicity for mice: JHM-DL infection results in acute encephalomyelitis while JHM-DS infection results in demyelination. Oligonucleotide fingerprint analysis of the RNA genomes of these two variants revealed that they had almost identical genetic sequences. Each variant, however, had a unique oligonucleotide spot not found in the other. The unique spot of the large plaque variant, JHM-DL, was localized at approximately 3 to 5 kb from the 3' end, while the JHM-DS unique spot was mapped at 14 to 15 kb from the 3' end of the genome. We have further shown that these oligonucleotide changes are not correlated with the plaque morphology. These two viruses may be useful for studying the molecular basis of virus-induced demyelination.
J Gen Virol 1982 Dec
PMID:Murine coronaviruses: isolation and characterization of two plaque morphology variants of the JHM neurotropic strain. 629 77

The involvement of lysosomes in infection by mouse hepatitis virus 3 (MHV3) was studied. L cells were infected with MHV3 in the presence of NH4Cl or chloroquine, weak bases which increase the intralysosomal pH and impair lysosomal functions. NH4Cl significantly inhibited virus-induced cytopathic effects and MHV3 replication, but did not prevent the attachment of 3H-labelled virus. No inhibition of MHV3 replication by NH4Cl and chloroquine was observed when lysosomotropic agents were added later than 3 h post-infection, suggesting the direct involvement of lysosomes in release of the viral genome into cytoplasm. These results, together with the lack of antibody-mediated immune lysis of MHV3-infected cells, suggest that MHV3 entered cells by an endocytic pathway (viropexis) followed by internalization into cellular lysosomes.
J Gen Virol 1984 Jan
PMID:Entry of mouse hepatitis virus 3 into cells. 631 70

The Tyzzer's disease organism was grown in primary monolayer cultures of adult mouse hepatocytes prepared by collagenase perfusion. The organisms produced a plaque-like cytopathic effect involving almost the whole culture around 72 h post-infection when the bacterial growth reached a maximum. The organisms showed specific immunofluorescence, and electron microscopy revealed that intracellular organisms had peritrichous flagella and underwent cell division. After intravenous inoculation of the infected cell culture into mice, necrotic hepatitis was produced and the organisms, recovered from the liver lesion, could be propagated in primary culture of mouse hepatocytes.
J Gen Microbiol 1983 Feb
PMID:Growth of Tyzzer's organism in primary monolayer cultures of adult mouse hepatocytes. 634 4

Acute-phase stool samples collected from hepatitis cases during outbreaks of water-borne epidemic hepatitis were examined by immune electron microscopy (IEM). Spherical virus-like particles (27 nm in diameter) were visualized in the stool of a hepatitis patient with serological evidence of non-A, non-B (NANB) hepatitis. The IEM demonstrated serological specificity of the antigen with the patient's own convalescent serum as well as a known pool of NANB hepatitis convalescent sera. It is suggested that these virus-like particles may be the aetiological agent of faeco -orally transmitted NANB epidemic hepatitis in India.
J Gen Virol 1984 May
PMID:Non-A, non-B epidemic hepatitis: visualization of virus-like particles in the stool by immune electron microscopy. 642 4

In a search for additional antigens associated with virus-induced human liver disease a radioimmunoassay (RIA) was developed using IgG from sera of a multiply transfused person. Polystyrene beads coated with IgG F(ab)'2 fragments, dinitrophenylated F(ab)'2 fragments and 125I-labelled anti-2,4-dinitrophenyl antibodies (Neurath & Strick, 1979) were used in the RIA. An apparently new antigen or the corresponding antibodies were detected in 155 serum specimens from 35/37 (94%)individuals who developed non-A, non-B hepatitis. The antigen was also present in hepatitis B surface antigen-negative sera of blood donors with normal (13.2%) and elevated levels of alanine aminotransferase (34%). The antigen has an approximate mol. wt. of 45,000, a buoyant density of 1.23 g/ml and an isoelectric point of 7.
J Gen Virol 1980 Jun
PMID:An antigen detected frequently in human sera with elevated levels of alanine aminotransferase: a potential marker for non-A, non-B hepatitis. 677 39

Using immune electron microscopy (IEM), low-level cross-reactions could be demonstrated between the surface antigens of hepatitis B and woodchuck hepatitis. However, immune complex formation was greatly enhanced by pre-exposure of the antigens to 0.5% deoxycholate. Cross-reaction between the core antigens and e antigens of both viruses was also confirmed by IEM as well as radioimmunoassay. It appears that the woodchuck sera used in this study may well contain an anti-immunoglobulin akin to rheumatoid factor.
J Gen Virol 1983 Apr
PMID:Antigenic cross-reactions between woodchuck hepatitis virus and human hepatitis B virus shown by immune electron microscopy. 683 11

Six commonly used strains of lymphocytic choriomeningitis virus (LCMV) [Armstrong (Arm) CA 1371, Arm E-350, WE, UBC, Traub and Pasteur C1PV 76001] were examined for distinctive genetic and biological properties. Agarose gel electrophoresis yielded no detectable differences among the L or S RNAs of these six strains. The RNase T1 fingerprint patterns of LCMV Arm CA 1371 and E-350 RNAs were similar, but in contrast, those of the WE, UBC, Traub and Pasteur strains differed from each other and from the pattern of LCMV Arm CA 1371 and E-350. There were also differences among LCMV strains in their biological properties. LCMV Arm CA 1371, E-350 and Pasteur caused severe vasculitis and focal necrotizing hepatitis in the livers of neonatally infected BALB/WEHI mice in contrast to LCMV WE which caused minimal lesions. LCMV Arm CA 1371 and E-350 were lethal for neonatal C3H/St mice. In contrast, LCMV WE, Traub and Pasteur induced persistent infections in C3H/St mice. Adult guinea-pigs resisted infection by Arm CA 1371, E-350, Traub and Pasteur but succumbed to WE and UBC LCMV strains. Our results show a wide variation in the RNA genomes of LCMV strains commonly used in research laboratories, and these genomic differences are accompanied by variations in the biological properties of LCMV strains.
J Gen Virol 1983 Aug
PMID:Genomic and biological variation among commonly used lymphocytic choriomeningitis virus strains. 687 16

We examined 24 C-type hepatitis specimens from Thailand and detected hepatitis C virus (HCV) RNA in all of them by RT-nested PCR for a portion of the HCV 5' non-coding (5' NC) region and a portion of the HCV core region. However, we failed to detect HCV RNA in 11 specimens by RT-nested PCR for a portion in the non-structural protein 5 (NS5) region that has been used commonly for HCV genotyping. We designed a new primer set for a separate portion of the NS5 region. Using this primer set, we succeeded in amplifying this portion in all 24 specimens. Two novel HCV genotypes, tentatively designated HCV-VII and HCV-VIII, were identified by sequencing these amplified regions. Our newly designed primers for RT-nested PCR may be useful for diagnosing infection as well as for genotyping unidentified HCV genomes.
J Gen Virol 1995 Sep
PMID:Novel genotypes of hepatitis C virus in Thailand. 756 72

Nine (10%) out of 90 hepatitis C virus (HCV) isolates from hepatitis patients and commercial blood donors in Thailand were not classifiable into any of genotypes I/1a, II/1b, III/2a, IV/2b, V/3a or VI/3b by RT-PCR with type-specific primers deduced from the HCV core gene. These isolates were sequenced over a 1.6 kb stretch of the 5'-terminal sequence and 1.1 kb of the 3'-terminal sequence covering 30% of the entire genome. Based on two-by-two comparison and phylogenetic analyses of the nine Thailand isolates among themselves and with known full or partial sequences of previously reported HCV isolates, the Thailand isolates were classified into five genotypes not reported previously, viz. 6b, 7c, 7d, 9b and 9c. Along with HCV isolates reported already, they make at least nine major genetic groups of HCV which further break down into at least 28 genotypes with sequence similarity in the E1 gene (576 bp) of < or = 80%. As many more HCV isolates of distinct genotypes are expected to be found throughout the world, it will become increasingly difficult to classify them by comparison of any partial sequences of the genome. Complete sequence data will be required for the full characterization and classification of HCV genotypes.
J Gen Virol 1995 Sep
PMID:Hepatitis C virus variants from Thailand classifiable into five novel genotypes in the sixth (6b), seventh (7c, 7d) and ninth (9b, 9c) major genetic groups. 756 73


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>