[The HIV antibody test in the differential diagnosis of infectious mononucleosis].
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AIDS Serodiagnosis↗
Biomedical subjects
D Neumann-Haefelin
Publications and source records attributed to D Neumann-Haefelin.
Epstein-Barr virus infection rapidly progressing to monoclonal lymphoproliferative disease in a child with selective immunodeficiency.
We report on a 30-month-old previously healthy Turkish boy who presented with fever, hepatosplenomegaly and generalized lymphadenopathy. He died 4 months after admission in spite of treatment with steroids, acycloguanosine and cyclophosphamide. Epstein-Barr virus (EBV) DNA was detected in the patient's bone marrow and in a lymph node biopsy. Cells from the lymph node biopsy showed monoclonal rearrangements of immunoglobulin heavy chain genes but no rearrangements of T-cell receptor beta-chain genes or immunoglobulin kappa chain genes. Serological data indicated chronic active EBV infection. There was a slight increase of CD8 positive cells in peripheral blood and a normal response to T-cell mitogens. However, T-cell lines established with interleukin 2 from lymph node biopsy completely failed to kill autologous EBV-transformed B-cells and K 562 target cells. Moreover, in regression tests the patient's peripheral blood mononuclear cells completely failed to limit outgrowth of autologous EBV infected B-cells. We conclude that the patient's selective immuno-deficiency had led to the rapid development of EBV-associated monoclonal lymphoproliferation.
Antibodies, Viral↗
Aggressive hepatitis in a patient with acute myeloid leukaemia during complete remission and detection of Epstein-Barr virus DNA in a liver biopsy.
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Adult↗
Structural analysis of proviral DNA in simian foamy virus (LK-3)-infected cells.
Proviral DNA of the T-cell lymphotropic simian foamy virus strain LK-3 was characterized. In infected cells, multiple copies of unintegrated linear duplex viral DNA of about 13 kbp length are present. Nuclease S1 treatment of the DNA generated two fragments of 6.5 and 6.0 kbp length that were cloned in phage and plasmid vectors. The proviral DNA contains a single-stranded gap of 109 nucleotides. A DNA fragment spanning the gap was cloned after completing the double strand by DNA synthesis in vitro. At the 3' end, the gap contains a polypurine tract (PPT) similar to the putative initiation site of retroviral plus strand DNA synthesis, suggesting discontinuous DNA synthesis. Further analysis of the genome architecture revealed LTRs of 1.7 kbp length. An additional 1.7 kbp DNA fragment was detected after nuclease S1 digestion of proviral DNA and probably represents trimmed intermediates of "strong-stop" DNA.
Animals↗
Fatal Hodgkin and non-Hodgkin lymphoma associated with persistent Epstein-Barr virus in four brothers.
Three brothers from one family died of Hodgkin disease and a fourth brother from a diffuse malignant non-Hodgkin lymphoma. This patient exhibited a constant deficiency of serum immunoglobulins and elevated antibody titers to Epstein-Barr viral antigens. Epstein-Barr virus DNA sequences were detected in DNA isolated from lymph node biopsies from two of the patients. Initially, no abnormalities in the numbers of B and T cells could be detected. Peripheral blood lymphocytes of the patients did not react in the mixed lymphocyte culture assay. We suggest that an immune deficiency to Epstein-Barr virus may favor the proliferation of malignant lymphocytes after Epstein-Barr viral infection. Monoclonal lymphoid B cell lines established spontaneously in vitro from a lymph node biopsy specimen and from peripheral blood specimens from two of the patients. The cells harbor Epstein-Barr viral DNA sequences in multiple genome equivalents and express Epstein-Barr nuclear antigen. The cells contain a tenfold increased level of c-fgr-related RNA transcripts compared with peripheral blood lymphocytes of healthy adults. No obvious amplifications or translocations of the c-myc, c-abl, or c-fgr gene could be detected.
Adult↗
Heterogeneity of primate foamy virus genomes. Brief report.
DNA of the T-lymphotropic simian foamy virus (SFV) LK-3 was cloned in a plasmid vector and used as a probe in comparative DNA:DNA hybridization studies with primate foamy viruses (SFV serotypes 1, 2, 3, 5, 6, 7, 8, fresh SFV isolates from 12 African green monkeys and one rhesus monkey, as well as human syncytium forming virus). All freshly isolated viruses seemed to be variants of SFV types 2 and 3. Especially LK-3 appeared to be closely related to SFV type 3. No hybridization of the LK-3 clone was observed to DNA sequences of human immunodeficiency virus (HIV-1).
Animals↗
The potency of interferon-alpha 2 and interferon-gamma in a combination therapy of dendritic keratitis. A controlled clinical study.
Forty-five patients with virologically confirmed dendritic keratitis were treated in a randomized, double-blind controlled study with a basic therapy of trifluorothymidine (TFT) eye drops. In addition they received different human recombinant interferon (rHu IFN) eye drops. The following results were obtained for average healing times: TFT plus one drop daily of rHu IFN-alpha 2 arg (30 million iu/ml): 3.3 days, TFT plus rHu IFN-gamma (30 million iu/ml): 3.9 days, TFT plus a mixture of alpha plus gamma (0.3 million iu/ml each): 6.1 days, TFT plus a mixture of alpha plus gamma (1.5 million iu/ml each): 3.3 days. High-titer gamma interferon did not significantly differ from high-titer alpha interferon in the combination therapy of dendritic keratitis. A mixture of alpha plus gamma at a moderate titer (1.5 million iu/ml each) was as effective as a high-titer mono-preparation. Adding a low-titer interferon mixture gave no better therapeutic results than antiviral monotherapy. Thus it seems possible to save about 90% of interferon commonly used in the combination therapy of dendritic keratitis by applying a mixture of different suitable interferons instead of interferon monospecies.
Clinical Trials as Topic↗
[Cytomegaloviruses and Kaposi sarcoma].
The cause of Kaposi's sarcoma is still unknown. Apart from genetic influences, the data available at present indicate that cytomegaloviruses may play a certain role. Serological investigations as well as results from molecular biology techniques seem to point to an association. However, whether the association is indeed causal remains to be determined.
Cell Line↗
[Cytomegalovirus infection: pathogenesis, diagnosis and prevention].
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Adult↗
Nucleic acid hybridization for detection of herpes viruses in clinical specimens.
A diagnostic hybridization assay for detecting varicella zoster virus (VZV), herpes simplex virus (HSV), and Epstein-Barr virus (EBV) in different clinical specimens was developed using cloned viral DNAs as probes. All probes detected at least 5 pg of homologous DNA and did not cross-react with other viral or cellular DNA. Results of cell culture, serology, and DNA assay were highly concordant. Using a simple standardized protocol for preparation of specimens, hybridization, and washing procedures, this sensitive and specific assay appears to be useful for screening clinical specimens and may be helpful in confirming the serological diagnosis of HSV encephalitis and persistent EBV infections or EBV-associated diseases.
Adult↗
Detection of herpes simplex virus and adenovirus DNA by dot blot hybridization using in vitro synthesized RNA transcripts.
A new diagnostic assay was developed to detect herpes simplex virus (HSV) and adenovirus DNA in clinical specimens using in vitro synthesized radioactively labelled RNA transcripts from virus-specific DNA fragments cloned in transcription vector pSP 64/65. RNA probes derived from HSV-I-Eco-RI-G-DNA fragment show a sensitivity of less than 3 pg of whole plasmid DNA and hybridize only with DNA of HSV I and II, but not with other viral or cellular DNA. The analysis of 15 clinical specimens showed concordance with virus isolation, except for two culture-negative samples of cerebrospinal fluid of patients with suspected HSV encephalitis, which was confirmed by serology as well as by hybridization. Using RNA transcripts from adenovirus-2-Hind-III-D-DNA fragment, we attained a sensitivity of less than 3 pg of whole plasmid DNA. This probe detected different types of adenovirus, but failed to hybridize to other viral, bacterial or cellular DNA. Compared with the cell culture method this assay did not show any false-positive or false-negative results in 16 different clinical specimens. The technique is sensitive, specific and useful for screening clinical specimens and may be helpful in confirming the diagnosis of HSV encephalitis.
Adenovirus Infections, Human↗
Detection of human cytomegalovirus in urine by DNA-DNA and RNA-DNA hybridization.
A diagnostic hybridization assay for detecting human cytomegalovirus (HCMV) DNA in urine specimens was developed by using cloned viral DNA and in vitro-synthesized RNA probes. Both probes detected 3 pg of homologous DNA and hybridized with DNA of HCMV but not with other viral or human cellular DNA tested. In 95 urine specimens simultaneously tested by cell culture, the sensitivity of hybridization was at least 83%, and the specificity was at least 92%. This assay will be useful for rapid viral diagnosis with wide clinical applications such as screening of immunocompromised patients and quantitation of viral shedding in patients with primary or reactivated HCMV infection who may be receiving antiviral therapy.
Child↗
Detection and characterization of infectious DNA intermediates of a primary foamy virus.
DNA from human T-lymphoid (Molt-4) and hamster kidney (BHK-21) cells infected with the T-lymphotropic simian foamy virus LK-3 was shown to be infectious, when assayed by transfection of BHK-21 cells. The proviral genome was further characterized by blot hybridization to a specific cDNA probe, which had been prepared by reverse transcription in vitro using viral RNA and RNA-dependent DNA polymerase present in cytoplasmic extracts of infected BHK-21 cells. This probe hybridized to a DNA species of 14 kbp in extracts from LK-3-infected diploid human fibroblasts, Molt-4 and BHK-21 cells, whereas no hybridization occurred with DNA from the respective uninfected controls. No integrated proviral DNA could be demonstrated, and the 14 kbp DNA was shown not to represent circular DNA. The patterns of restriction endonuclease and S1 nuclease fragments indicated a unique configuration of linear double-stranded DNA containing a single-stranded section separating two subunits one of which may be sufficient to transmit LK-3 by transfection with DNA.
Animals↗
Interferon therapy for bronchial papillomatosis controlled by papillomavirus-DNA hybridization.
In biopsy specimens from a patient with tracheal and bronchial papillomatosis, human papillomavirus (HPV) type 11 DNA was identified. Treatment with leukocyte interferon was initiated, and the results of therapy was monitored by molecular hybridization of biopsy specimens with phosphorus 32-labeled HPV type 11 DNA after interferon application. There was no improvement of the clinical course, although two of five biopsy specimens showed a considerable reduction in the amount of HPV type 11. We discuss the reasons for the insufficient effect of therapy and propose molecular hybridization as an additional method for therapy control in viral diseases.
Bronchial Neoplasms↗
Recombinant HuIFN-gamma prevents herpes simplex keratitis in African green monkeys: demonstration of synergism with recombinant HuIFN-alpha 2.
Human interferon gamma (HuIFN-gamma) was found to prevent herpes-simplex virus (HSV 1) induced keratitis in monkey eyes, when administered topically at concentrations of greater than or equal to 3 X 10(5) reference units/ml. Protective efficacy demonstrated with lower concentrations of HuIFN-gamma in combination with low titers of HuIFN-alpha provided evidence of synergistic interferon activity in vivo. Tolerance problems observed in eyes affected by virus inoculation seem to be attributable to the experimental conditions including species heterology.
Animals↗
[Cytomegalovirus infection--significance in gynecology and obstetrics].
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Adult↗
[Herpes simplex encephalitis in the newborn infant--a review].
Neonatal herpes simplex encephalitis is a rare, but very threatening disease which leads to death or to severe cerebral damage with only a few exceptions. In the past few years antiviral agents have become available which have proved to influence the course of the disease in a positive manner. Therefore the problem is a challenge for neonatologists and pediatric neurologists. The virologic and epidemiologic aspects of neonatal herpes encephalitis and its prophylactic, diagnostic and therapeutic possibilities are reviewed. The efficacy of virustatic therapy is related to the onset of therapy which should be started as soon as possible. The typical EEG- and CT-changes are due to an already advanced stage of the disease. Virologic examinations in the first days are of limited value. Brain biopsy should not be performed in this age group. Therefore the indication to start antiviral chemotherapy depends exclusively on the clinical picture.
Antibodies, Viral↗
[Persistent (chronic active) Epstein-Barr virus infection and arthritis in childhood].
Between 1981 und 1983 some 1300 patients with the primary diagnosis of juvenile chronic arthritis were admitted. In 9 of them a persistent EBV-infection was simultaneously evident. The course of disease was primarily systemic with the characteristic criteria: high septic intermittent fever, rheumatic exanthema, hepatosplenomegaly and lymphadenopathy. It is still unclear whether a replication of virus in the synovia or a precipiation of immune complexes is involved. A common cause for the persistent EBV-infection and arthritis via an immune-suppressive agent is possible.
Antibodies, Viral↗