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Dhingra A, Götting J, Varanasi PR, Steinbrueck L, Camiolo S, Zischke J, Heim A, Schulz TF, Weissinger EM, Kay-Fedorov PC, Davison AJ, Suárez NM, Ganzenmueller T. Human cytomegalovirus multiple-strain infections and viral population diversity in haematopoietic stem cell transplant recipients analysed by high-throughput sequencing. Med Microbiol Immunol 2021; 210:291-304. [PMID: 34611744 PMCID: PMC8541999 DOI: 10.1007/s00430-021-00722-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 09/21/2021] [Indexed: 01/22/2023]
Abstract
Human cytomegalovirus (HCMV) is an important opportunistic pathogen in allogeneic haematopoietic stem cell transplant (HSCT) recipients. High-throughput sequencing of target-enriched libraries was performed to characterise the diversity of HCMV strains present in this high-risk group. Forty-four HCMV-DNA-positive plasma specimens (median viral input load 321 IU per library) collected at defined time points from 23 HSCT recipients within 80 days of transplantation were sequenced. The genotype distribution for 12 hypervariable HCMV genes and the number of HCMV strains present (i.e. single- vs. multiple-strain infection) were determined for 29 samples from 16 recipients. Multiple-strain infection was observed in seven of these 16 recipients, and five of these seven recipients had the donor (D)/recipient (R) HCMV-serostatus combination D + R + . A very broad range of genotypes was detected, with an intrahost composition that was generally stable over time. Multiple-strain infection was not associated with particular virological or clinical features, such as altered levels or duration of antigenaemia, development of acute graft-versus-host disease or increased mortality. In conclusion, despite relatively low viral plasma loads, a high frequency of multiple-strain HCMV infection and a high strain complexity were demonstrated in systematically collected clinical samples from this cohort early after HSCT. However, robust evaluation of the pathogenic role of intrahost viral diversity and multiple-strain infection will require studies enrolling larger numbers of recipients.
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Affiliation(s)
- A. Dhingra
- Hannover Medical School, Institute of Virology, Hannover, Germany ,German Center for Infection Research (DZIF), Site Hannover-Braunschweig, Hannover, Germany
| | - J. Götting
- Hannover Medical School, Institute of Virology, Hannover, Germany ,German Center for Infection Research (DZIF), Site Hannover-Braunschweig, Hannover, Germany
| | - P. R. Varanasi
- German Center for Infection Research (DZIF), Site Hannover-Braunschweig, Hannover, Germany ,Department of Haematology, Haemostasis and Oncology, Hannover Medical School, Hannover, Germany ,Present Address: National Centre for Biological Sciences, Bangalore, India
| | - L. Steinbrueck
- Hannover Medical School, Institute of Virology, Hannover, Germany ,German Center for Infection Research (DZIF), Site Hannover-Braunschweig, Hannover, Germany
| | - S. Camiolo
- MRC-University of Glasgow Centre for Virus Research, Glasgow, UK
| | - J. Zischke
- Hannover Medical School, Institute of Virology, Hannover, Germany ,German Center for Infection Research (DZIF), Site Hannover-Braunschweig, Hannover, Germany
| | - A. Heim
- Hannover Medical School, Institute of Virology, Hannover, Germany ,German Center for Infection Research (DZIF), Site Hannover-Braunschweig, Hannover, Germany
| | - T. F. Schulz
- Hannover Medical School, Institute of Virology, Hannover, Germany ,German Center for Infection Research (DZIF), Site Hannover-Braunschweig, Hannover, Germany
| | - E. M. Weissinger
- German Center for Infection Research (DZIF), Site Hannover-Braunschweig, Hannover, Germany ,Department of Haematology, Haemostasis and Oncology, Hannover Medical School, Hannover, Germany
| | - P. C. Kay-Fedorov
- Hannover Medical School, Institute of Virology, Hannover, Germany ,German Center for Infection Research (DZIF), Site Hannover-Braunschweig, Hannover, Germany
| | - A. J. Davison
- MRC-University of Glasgow Centre for Virus Research, Glasgow, UK
| | - N. M. Suárez
- MRC-University of Glasgow Centre for Virus Research, Glasgow, UK
| | - T. Ganzenmueller
- Hannover Medical School, Institute of Virology, Hannover, Germany ,German Center for Infection Research (DZIF), Site Hannover-Braunschweig, Hannover, Germany ,Institute for Medical Virology and Epidemiology, University Hospital Tuebingen, Elfriede-Aulhorn-Str. 6, 72076 Tuebingen, Germany
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2
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Weissinger EM, Human C, Metzger J, Hambach L, Wolf D, Greinix HT, Dickinson AM, Mullen W, Jonigk D, Kuzmina Z, Kreipe H, Schweier P, Böhm O, Türüchanow I, Ihlenburg-Schwarz D, Raad J, Durban A, Schiemann M, Könecke C, Diedrich H, Holler E, Beutel G, Krauter J, Ganser A, Stadler M. The proteome pattern cGvHD_MS14 allows early and accurate prediction of chronic GvHD after allogeneic stem cell transplantation. Leukemia 2016; 31:654-662. [PMID: 27677743 DOI: 10.1038/leu.2016.259] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 08/24/2016] [Accepted: 08/30/2016] [Indexed: 12/14/2022]
Abstract
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) may be curative, but is associated with significant morbidity and mortality. Chronic graft-versus-host disease (cGvHD), characterized by inflammation and fibrosis of multiple target organs, considerably contributes to the morbidity and mortality even years after allo-HSCT. Diagnosis of cGvHD is based on clinical features and histology of biopsies. Here, we report the generation of a urinary cGvHD-specific proteome-pattern (cGvHD_MS14) established by capillary electrophoresis-mass spectrometry to predict onset and severity of cGvHD as an unbiased laboratory test. cGvHD_MS14 was evaluated on samples from 412 patients collected prospectively in four transplant centers. Sensitivity and specificity was 84 and 76% by cGvHD_MS14 classification. Sensitivity further increased to 93% by combination of cGvHD_MS14 with relevant clinical variables to a logistic regression model. cGvHD was predicted up to 55 days prior to clinical diagnosis. Acute GvHD is not recognized by cGvHD_MS14. cGvHD_MS14 consists of 14 differentially excreted peptides, six of those have been sequenced to date and are fragments from thymosin β-4, eukaryotic translation initiation factor 4γ2, fibrinogen β-chain or collagens. In conclusion, the cGvHD_MS14-pattern allows early, highly sensitive and specific prediction of cGvHD as an independent diagnostic criterion of clinical diagnosis potentially allowing early therapeutic intervention.
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Affiliation(s)
- E M Weissinger
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - C Human
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - J Metzger
- Mosaiques-Diagnostics, Hannover, Germany
| | - L Hambach
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - D Wolf
- Department of Hematology and Oncology, University of Regensburg, Regensburg, Germany
| | - H T Greinix
- 1st Department of Internal Medicine, Medical University of Vienna, Vienna, Austria and Division of Hematology, Medical University of Graz, Graz, Austria
| | - A M Dickinson
- Institute of Cellular Medicine, Newcastle University, Newcastle-upon-Tyne, UK
| | - W Mullen
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK
| | - D Jonigk
- Institute of Pathology, Hannover Medical School, Hannover, Germany
| | - Z Kuzmina
- 1st Department of Internal Medicine, Medical University of Vienna, Vienna, Austria and Division of Hematology, Medical University of Graz, Graz, Austria
| | - H Kreipe
- Institute of Pathology, Hannover Medical School, Hannover, Germany
| | - P Schweier
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - O Böhm
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - I Türüchanow
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - D Ihlenburg-Schwarz
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - J Raad
- Mosaiques-Diagnostics, Hannover, Germany
| | - A Durban
- Mosaiques-Diagnostics, Hannover, Germany
| | | | - C Könecke
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - H Diedrich
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - E Holler
- Department of Hematology and Oncology, University of Regensburg, Regensburg, Germany
| | - G Beutel
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - J Krauter
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany.,Department of Hematology and Oncology, Klinikum Braunschweig, Braunschweig, Germany
| | - A Ganser
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
| | - M Stadler
- Department of Hematology, Hemostasis, Oncology and Stem cell transplantation, Hannover Medical School, Hannover, Germany
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3
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Weissinger EM, Oettrich K, Evans C, Genieser HG, Schwede F, Dangers M, Dammann E, Kolb HJ, Mischak H, Ganser A, Kolch W. Activation of protein kinase A (PKA) by 8-Cl-cAMP as a novel approach for antileukaemic therapy. Br J Cancer 2004; 91:186-92. [PMID: 15188002 PMCID: PMC2364761 DOI: 10.1038/sj.bjc.6601909] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Activation of PKA by cAMP agonists, such as 8-Cl-cAMP activation, selectively causes rapid apoptosis in v-abl transformed fibroblasts by inhibiting the Raf-1 kinase. Here we investigated whether 8-Cl-cAMP is useful for the treatment of chronic myelogenous leukaemia (CML), which is hallmarked by the expression of the p210bcr/abl oncogene. Autologous bone marrow transplantation is a feasible alternative for patients with no suitable donor, but hampered by the risk of relapse due to the persistence of leukaemia cells in the transplant. To study the effects of 8-Cl-cAMP on primary leukaemic cells, bone marrow cells (BMCs) from eight CML patients (one at diagnosis, three in chronic and four in accelerated phase) were treated. Ex vivo treatment of BMCs obtained in chronic phase of CML with 100 μM 8-Cl-cAMP for 24–48 h led to the selective purging of Philadelphia Chromosome (Ph1 chromosome) without toxic side effects on BMCs from healthy donors as measured by colony-forming unit (CFU) assays. BMCs from patients in accelerated phase showed selective, but incomplete elimination of Ph1 chromosome positive colony forming cells. The mechanism of 8-Cl-cAMP was investigated in FDCP-mix cells transformed by p210bcr/abl, a cell culture model for CML. The results showed that 8-Cl-cAMP reduced DNA synthesis and viability independent of Raf inhibition as Raf inhibitors had no effect. MEK inhibitors interfered with DNA synthesis, but not with viability. In summary, our results indicate that 8-Cl-cAMP could be useful to purge malignant cells from the bone marrow of patients with CML and certain other forms of leukaemias.
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Affiliation(s)
- E M Weissinger
- Medizinische Hochschule Hannover (MHH), Department of Hematology and Oncology, Hannover, Germany
- Mosaiques diagnostics and therapeutics AG, Hannover, Germany
- Medical School of Hannover and Mosaiques Diagnostics GmbH; Feodor-Lynen-Str. 21, 30625 Hannover, Germany. E-mail:
| | - K Oettrich
- Klinikum Großhadern, Clinical Cooperative Group Hematopoietic Cell Transplantation, Munich, Germany
| | - C Evans
- Leukaemia Research Fund Cellular Development Unit, UMIST, Manchester UK
- LRF Proteomics Facility, UMIST, UK
| | | | - F Schwede
- Biolog Life Science Institute, Bremen, Germany
| | - M Dangers
- MHH, Department of Nephrology, Hannover Germany
| | - E Dammann
- Medizinische Hochschule Hannover (MHH), Department of Hematology and Oncology, Hannover, Germany
| | - H-J Kolb
- Klinikum Großhadern, Clinical Cooperative Group Hematopoietic Cell Transplantation, Munich, Germany
| | - H Mischak
- Mosaiques diagnostics and therapeutics AG, Hannover, Germany
- MHH, Department of Nephrology, Hannover Germany
| | - A Ganser
- Medizinische Hochschule Hannover (MHH), Department of Hematology and Oncology, Hannover, Germany
| | - W Kolch
- Beatson Institute for Cancer Research, Signalling and Proteomics Group, Garscube Estate, Glasgow, UK
- Institute for Biomedical and Life Sciences, University of Glasgow, Glasgow, UK
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Huss R, Weissinger EM, Lange C, Gatsios P, Eissner G, Kolb HJ, Diebold J, Heinrich PC, Graeve L. In vitro-generated stem cell leukaemia showing altered cell cycle progression with distinct signalling of the tyrosine-phosphorylated rasGAP-associated p62(dok) protein. J Pathol 2000; 192:363-72. [PMID: 11054720 DOI: 10.1002/1096-9896(2000)9999:9999<::aid-path716>3.0.co;2-n] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In an attempt to gain more insight into the events of leukaemic transformation, a cell line overexpressing MHC class II (DR) was generated by transfecting an early CD34-negative haematopoietic progenitor stem cell line with the appropriate constructs. The stable transfection with genes for DR antigens leads to cellular transformation. The DR(+) transformed cell clones express a tyrosine-phosphorylated DR heterodimer and show a significantly different morphology. DR(+) clones present the morphology of an immature myeloid neoplasia expressing alpha-naphthyl-acetate-esterase (ANAE), but neither myeloperoxidase nor CD34. While D064 cells predominately grow adherent as fibroblast-like cells, the DR(+) clones display a decrease in adherent growth. Although both cell lines express similar amounts of the interleukin-6 (IL-6) signal transducer gp130, the DR-transfected cells still show activation of STAT factors by IL-6, whereas D064 cells do not. Although the transformed clones present acceleration of cell-cycle transition and growth, the G(0)/G(1) progression inhibitor p27(kip-1) is up-regulated, while the expression of proteins involved in the S/G(2) phase transition, such as cyclin B and cdc2 (p34), is suppressed. Instead cyclin D3, one of the G(0)/G(1) progression factors, is up-regulated, as well as tyrosine-phosphorylated p62(dok), suggesting dysregulation of cell cycle-controlling proteins. In addition, DR(+) leukaemia-like cells also overexpress Bcl-2, while bax expression is suppressed, compared with the wild-type (wt) parental haematopoietic stem cell line.
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Affiliation(s)
- R Huss
- Institute of Pathology, University of Munich, Thalkirchner Str. 36, D-80337 Munich, Germany.
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5
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Huss R, Lange C, Weissinger EM, Kolb HJ, Thalmeier K. Evidence of peripheral blood-derived, plastic-adherent CD34(-/low) hematopoietic stem cell clones with mesenchymal stem cell characteristics. Stem Cells 2000; 18:252-60. [PMID: 10924091 DOI: 10.1634/stemcells.18-4-252] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The hematopoietic system of vertebrates can be completely reconstituted with hematopoietic stem cells derived from the bone marrow, fetal liver, or cord blood, or even from peripheral-blood-derived cells. A cellular marker to identify those cells is the proteoglycan CD34, although we have shown that the earliest identifiable hematopoietic stem cell is a CD34(-) fibroblast-like cell which can differentiate into CD34(+) hematopoietic precursors. Peripheral blood mononuclear cells were isolated from the heparinized blood of a dog and incubated in tissue culture in the presence of interleukin 6. After 10-14 days, an adherent layer of fibroblast-like cells had developed and cells were immortalized using the SV-40 large T antigen. Cells were cloned and subcloned by measures of limiting dilution, and various fibroblast-like clones were established. These fibroblast-like cells either do not express the CD34 antigen or express CD34 on a low level, although transcribing CD34. The CD34(-/low) cells express osteocalcin as a mesenchymal cell marker. The fibroblast-like cells eventually differentiate spontaneously in vitro into CD34(+) precursors and show colony formation. Prior to autologous stem cell transplantation, one clone of choice (IIIG7) was transfected with a retroviral construct containing the green-fluorescence protein (GFP). The recipient dog was totally irradiated with 300 cGy and received a stem cell transplant with GFP-containing, immortalized, fibroblast-like monoclonal autologous stem cells (0.5 x 10(8)/kg dog). No additional growth factors were applied. The peripheral blood counts recovered after 23 days (WBC >500; platelets >10,000). A peripheral blood smear showed some dim but definite, although timely, limited expression of the GFP protein in nucleated peripheral blood cells just five weeks after transplantation. A bone marrow biopsy showed GFP-positive cells in the marrow cavity predominantly as "bone-lining cells."
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Affiliation(s)
- R Huss
- Institute of Pathology, University of Munich, Germany.
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6
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Weissinger EM, Franz M, Voss C, Bonini C, Kremmer E, Kolb HJ. Expression of HSV-TK suicide gene in primary T lymphocytes: the dog as a preclinical model. Cytokines Cell Mol Ther 2000; 6:25-33. [PMID: 10976536 DOI: 10.1080/13684730050515886] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Expression of suicide genes (e.g. herpes simplex virus thymidine kinase,HSV-TK) in T cells is an appealing approach to regulate graft-versus-host disease in adoptive immunotherapy. Here we report the optimization of retroviral infection of canine T cells. Canine T cells were stimulated either with phytohemagglutinin (PHA, 2 microg/ml) for 24-72 hours or with 100 U/ml interleukin-2 for seven days. Stimulated cells were co-cultivated with irradiated virus-producing cells. Transduction efficiencies ranged from 4% to 45% using PG13, a gibbon ape leukemia virus envelope (env) pseudotyped packaging cell line. Infection of cells with GPenvAM12, expressing the amphotropic Moloney murine leukemia virus env, did not yield a satisfactory percentage of transduced cells. Enrichment of transduced cells was performed using immunoselection, and gave a purity of up to 98%. Transfusion of 1 x 10(6) transduced cells per kilogram body weight showed that transduced cells could convert mixed chimerism to 100% and transfer immunity to a specific antigen. Transduced cells were repeatedly detected in peripheral blood and bone marrow by polymerase chain reaction with primers specific for the HSV-TK gene. We have demonstrated the feasibility of using the canine model to study gene therapy as a preclinical model.
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Maucher C, Weissinger EM, Kremmer E, Baccarini M, Procyk K, Henderson DW, Wolff L, Kolch W, Kaspers B, Mushinski JF, Mischak H. Activation of bcl-2 suppressible 40 and 44 kDa p38-like kinases during apoptosis of early and late B lymphocytic cell lines. FEBS Lett 1998; 427:29-35. [PMID: 9613594 DOI: 10.1016/s0014-5793(98)00387-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Activation of several different kinases characterizes the induction of apoptosis. Abelson virus transformed pre-B lymphocytes undergo apoptosis within 24 h of serum deprivation, PKA activation or gamma-irradiation, and the activity of two kinases of ca. 40 and 44 kDa is specifically induced during this apoptotic process. Bcl-2 expression prevents both apoptosis and the induction of these kinases. Immunologic and substrate similarities indicate that these kinases are related to the p38 family of MAP kinases. More mature cells of the B lymphocytic lineage, plasmacytomas, also exhibit induction of these kinases when apoptosis is induced by withdrawal of serum or IL-6. Treatment of the pre-B cells with ICE protease inhibitors when apoptotic stimuli are delivered prevents induction of the kinase activity, and partially inhibits apoptosis. These findings indicate that the induction of these 40 and 44 kDa p38 related kinases is a common feature of apoptosis in mouse B lymphocytic cells and may represent a step downstream of ICE proteases in the signal cascade that leads to programmed cell death.
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Affiliation(s)
- C Maucher
- Institut für Klinische Molekularbiologie und Tumorgenetik, GSF, Munich, Germany.
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8
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Weissinger EM, Eissner G, Grammer C, Fackler S, Haefner B, Yoon LS, Lu KS, Bazarov A, Sedivy JM, Mischak H, Kolch W. Inhibition of the Raf-1 kinase by cyclic AMP agonists causes apoptosis of v-abl-transformed cells. Mol Cell Biol 1997; 17:3229-41. [PMID: 9154822 PMCID: PMC232176 DOI: 10.1128/mcb.17.6.3229] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Here we investigate the role of the Raf-1 kinase in transformation by the v-abl oncogene. Raf-1 can activate a transforming signalling cascade comprising the consecutive activation of Mek and extracellular-signal-regulated kinases (Erks). In v-abl-transformed cells the endogenous Raf-1 protein was phosphorylated on tyrosine and displayed high constitutive kinase activity. The activities of the Erks were constitutively elevated in both v-raf- and v-abl-transformed cells. In both cell types the activities of Raf-1 and v-raf were almost completely suppressed after activation of the cyclic AMP-dependent kinase (protein kinase A [PKA]), whereas the v-abl kinase was not affected. Raf inhibition substantially diminished the activities of Erks in v-raf-transformed cells but not in v-abl-transformed cells, indicating that v-abl can activate Erks by a Raf-1-independent pathway. PKA activation induced apoptosis in v-abl-transformed cells while reverting v-raf transformation without severe cytopathic effects. Overexpression of Raf-1 in v-abl-transformed cells partially protected the cells from apoptosis induced by PKA activation. In contrast to PKA activators, a Mek inhibitor did not induce apoptosis. The diverse biological responses correlated with the status of c-myc gene expression. v-abl-transformed cells featured high constitutive levels of expression of c-myc, which were not reduced following PKA activation. Myc activation has been previously shown to be essential for transformation by oncogenic Abl proteins. Using estrogen-regulated c-myc and temperature-sensitive Raf-1 mutants, we found that Raf-1 activation could protect cells from c-myc-induced apoptosis. In conclusion, these results suggest (i) that Raf-1 participates in v-abl transformation via an Erk-independent pathway by providing a survival signal which complements c-myc in transformation, and (ii) that cAMP agonists might become useful for the treatment of malignancies where abl oncogenes are involved, such as chronic myeloid leukemias.
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Affiliation(s)
- E M Weissinger
- Institut für Klinische Hämatologie, GSF, Hamatologikum, Munich, Germany
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9
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Abstract
Chronic myelogenous leukemia is a disease of the pluripotent stem cell that involves the myeloid and, to a varying degree, the lymphoid compartment. We studied the involvement of B cells in chronic myelogenous leukemia at diagnosis and during treatment. B lymphocytes were immortalized by infection with Epstein-Barr virus. B-lymphoid cell lines could be established from 25 patients suffering from Philadelphia-chromosome (Ph1)-positive chronic myelogenous leukemia. The cell lines were tested for expression of the typical 210-kDa fusion protein, p210, using Western-blot analysis, and/or for mRNA expression of bcr-abl fusion genes, using reverse transcriptase polymerase chain reaction analysis. At diagnosis, mosaicism of B cells was demonstrated in every patient. During treatment with interferon alpha, p210-expressing B-lymphoid cell lines could not be established from 8 of 8 patients. Following discontinuation of IFN-alpha therapy, p210-positive cell lines were found early, even before cytogenetic recurrence. Resistance to IFN-alpha therapy and progression of the disease were both associated with the appearance of p210-positive cell lines. Cell lines established from 3 healthy individuals and from patients suffering from Ph1-negative diseases did not show p210 expression in Western blots. Our data suggest that B lymphocytes are involved early in the disease, and that B-cell mosaicism may be a sensitive marker for resistance to IFN-alpha therapy and disease progression.
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MESH Headings
- B-Lymphocytes/pathology
- Fusion Proteins, bcr-abl/biosynthesis
- Fusion Proteins, bcr-abl/genetics
- Humans
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Polymerase Chain Reaction
- RNA, Messenger/biosynthesis
- Tumor Cells, Cultured
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Affiliation(s)
- E M Weissinger
- Institute for Clinical Hematology, GSF, National Research Institute for Environment and Health, Munich, Germany.
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Weissinger EM, Byrd LG, Henderson DW, Mushinski JF. Overexpression of v-abl uniquely cooperates with c-myc dysregulation in induction of plasma cell tumors, bypassing the need for T-lymphocytic help and overcoming T-lymphocytic interference. Int J Cancer 1996; 67:142-7. [PMID: 8690515 DOI: 10.1002/(sici)1097-0215(19960703)67:1<142::aid-ijc23>3.0.co;2-f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We have investigated the effects of T lymphocytes on induction of mouse plasma cell tumors. We show that ABL-MYC, a plasmacytomagenic retrovirus that constitutively expresses v-abl and c-myc, is able to induce plasmacytomas in 100% of athymic BALB/c mice, with or without intraperitoneal pristane pretreatment. Other induction regimens are ineffective under these conditions, indicating that the combination of v-abl and c-myc oncogenes is uniquely able to transform plasma cells in mice that are deficient in T lymphocytes. Furthermore, in the absence of pristane, ABL-MYC-infected athymic congenics developed plasmacytomas in half the time required for euthymic BALB/c mice, suggesting that T lymphocytes can have a negative effect and can retard, but not totally inhibit, the outgrowth of plasmacytomas. This phenomenon could not be appreciated in other regimens of plasmacytoma induction, because only ABL-MYC is sufficient to induce plasmacytomas in athymic mice or in euthymic mice in the absence of pristane pretreatment.
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Affiliation(s)
- E M Weissinger
- Laboratory of Genetics, National Cancer Institute, Bethesda, MD, USA
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11
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Roden RB, Weissinger EM, Henderson DW, Booy F, Kirnbauer R, Mushinski JF, Lowy DR, Schiller JT. Neutralization of bovine papillomavirus by antibodies to L1 and L2 capsid proteins. J Virol 1994; 68:7570-4. [PMID: 7523700 PMCID: PMC237204 DOI: 10.1128/jvi.68.11.7570-7574.1994] [Citation(s) in RCA: 123] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
We have generated four mouse monoclonal antibodies (MAbs) to bovine papillomavirus virions that bound type-specific, adjacent, and conformationally dependent epitopes on the L1 major capsid protein. All four MAbs were neutralizing at ratios of 1 MAb molecule per 5 to 25 L1 molecules, but only three effectively blocked binding of the virus to the cell surface. Therefore, antibodies can prevent papillomavirus infection by at least two mechanisms: inhibition of cell surface receptor binding and a subsequent step in the infectious pathway. The neutralizing epitopes of the bovine papillomavirus L2 minor capsid protein were mapped to the N-terminal half of L2 by blocking the neutralizing activity of full-length L2 antiserum with bacterially expressed peptides of L2. In addition, rabbit antiserum raised against amino acids 45 to 173 of L2 had a neutralizing titer of 1,000, confirming that at least part of the N terminus of L2 is exposed on the virion surface.
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Affiliation(s)
- R B Roden
- Laboratory of Cellular Oncology, National Cancer Institute, Bethesda, Maryland 20892
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Weissinger EM, Henderson DW, Mischak H, Goodnight J, Mushinski JF. Induction of plasmacytomas that secrete monoclonal anti-peptide antibodies by retroviral transformation. J Immunol Methods 1994; 168:123-30. [PMID: 8288888 DOI: 10.1016/0022-1759(94)90216-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
ABL-MYC, a retrovirus that coexpresses v-abl and c-myc, was used to infect six BALB/c mice that had been immunized twice with a KLH-conjugated peptide that consisted of the 18 carboxyterminal amino acids of protein kinase C-eta (PKC-eta). All mice developed transplantable, monoclonal plasmacytomas, and five out of six plasmacytomas secreted antigen-specific antibodies, even after transplantation. All these antibodies recognized PKC-eta on Western blots of crude cell lysates and did not cross react with other isoforms of the PKC family.
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Affiliation(s)
- E M Weissinger
- Laboratory of Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
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13
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Weissinger EM, Mischak H, Goodnight J, Davidson WF, Mushinski JF. Addition of constitutive c-myc expression to Abelson murine leukemia virus changes the phenotype of the cells transformed by the virus from pre-B-cell lymphomas to plasmacytomas. Mol Cell Biol 1993; 13:2578-85. [PMID: 8455630 PMCID: PMC359590 DOI: 10.1128/mcb.13.4.2578-2585.1993] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Abelson murine leukemia virus (A-MuLV), a retrovirus that expresses the v-abl oncogene, characteristically induces pre-B-cell lymphomas following in vivo infection of BALB/c mice or in vitro infection of suspensions of fetal liver or bone marrow cells. ABL-MYC, a retrovirus that expresses both v-abl and c-myc, induces solely plasmacytomas in BALB/c mice. To investigate how the addition of overexpression of c-myc to that of v-abl accomplishes this dramatic change in the phenotype of the cells transformed by these closely related retroviruses, we utilized helper-free A-MuLV (psi 2) and ABL-MYC (psi 2) in vitro to infect suspensions of cells from different lymphoid tissues and purified immature and purified mature B cells. As expected, A-MuLV(psi 2) induced only pre-B-cell lymphomas in vivo and in vitro when immature B cells were present. ABL-MYC(psi 2), on the other hand, produced only plasmacytomas, even when purified immature B lymphocytes were infected in vitro. Although the A-MuLV(psi 2)-induced pre-B-cell lymphomas express easily detectable levels of c-myc mRNA, maturation into more-mature forms of B lymphocytes is blocked. The constitutively overexpressed c-myc in the ABL-MYC retrovirus abrogates this block, permits maturation of infected immature B cells, and yields transformed plasma cells.
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Affiliation(s)
- E M Weissinger
- Molecular Genetics Section, National Cancer Institute, Bethesda, Maryland 20892
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Weissinger EM, Mischak H, Largaespada DA, Kaehler DA, Mitchell T, Smith-Gill SJ, Risser R, Mushinski JF. Induction of plasmacytomas secreting antigen-specific monoclonal antibodies with a retrovirus expressing v-abl and c-myc. Proc Natl Acad Sci U S A 1991; 88:8735-9. [PMID: 1924333 PMCID: PMC52584 DOI: 10.1073/pnas.88.19.8735] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
ABL-MYC, a recombinant murine retrovirus that expresses v-abl and c-myc, rapidly induces transplantable mono- or oligoclonal plasmacytomas in BALB/c mice. To determine if the targets for transformation of this retrovirus are antigen-committed B lymphocytes and to explore this system as an alternative technique for producing antigen-specific monoclonal antibodies, plasmacytomas were induced in mice that had been immunized with two different types of immunogens, hen egg white lysozyme and sheep red blood cells. The majority of these plasmacytomas secreted immunogen-specific antibodies. Plasmacytomas induced in unimmunized mice did not react with hen egg white lysozyme or sheep red blood cells. The specific antibodies were comparable in concentration, specificity, and affinity to monoclonal antibodies obtained with conventional hybridoma technology, but, in addition to IgGs and IgMs, they included specific IgA antibodies, which are rare among splenic-derived hybridomas. Our results demonstrate that a principal target for ABL-MYC is an antigen-committed B lymphocyte. In addition this procedure provides an alternative method for the production of monoclonal antibodies, without a requirement for hetero-caryon formation by cell fusion techniques.
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Affiliation(s)
- E M Weissinger
- Molecular Genetics Section, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
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Weissinger EM, Largaespada D, Smith-Gill SJ, Risser R, Mushinski JF, Mischak H. A retrovirus expressing v-abl and c-myc induces plasmacytomas in 100% of adult pristane-primed BALB/c mice. Curr Top Microbiol Immunol 1990; 166:121-7. [PMID: 2073789 DOI: 10.1007/978-3-642-75889-8_16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- E M Weissinger
- Laboratory of Genetics, National Cancer Institute, NIH, Bethesda, MD 20892
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