Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0026764 (multiple myeloma)
 36,148 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Organ toxicity in BMT may in part be due to free radical damage. Therefore the 'Total Radical-trapping Antioxidant Parameter of plasma' (TRAP), individual plasma antioxidants, serum iron and linoleic acid, a main substrate of lipid peroxidation, were monitored before and after BMT, and they were compared with values obtained from healthy controls. Seven patients (3 AML, 3 CML, 1 multiple myeloma) receiving 16 mg/kg busulfan, 30-45 mg VP-16 and 120 mg/kg cyclophosphamide were investigated. TRAP values declined during chemotherapy by about 40% (day -9: 1019 +/- 245 mumol/l, mean +/- s.d.; day 0: 660 +/- 164 mumol/l; P < 0.05). The concentration of uric acid, one of the main antioxidants in plasma, decreased markedly (day -9: 339 +/- 108 mumol/l, day 0: 148 +/- 61 mumol/l; P < 0.05) and paralleled TRAP values. Vitamin E and bilirubin did not change from day -9 to 0 whereas vitamin C increased (day -9: 46 +/- 16 mumol/l, day 0: 89 +/- 44 mumol/l; P < 0.05). Serum iron rapidly increased within the pre-transplantation period, reaching values normally seen only in iron overload (day -9: 11.8 +/- 5.2 mumol/l, day 0: 40.6 +/- 6.5 mumol/l; P < 0.05). Linoleic acid levels were normal at the start and decreased substantially (27.0 +/- 1.6 wt% at day -9; 15.7 +/- 4.9 wt% at day 0; P < 0.05), indicating possible lipid peroxidation during high-dose chemotherapy. In conclusion, complex monitoring of the antioxidant status before and after BMT revealed a breakdown of plasma antioxidant defence and of radical-vulnerable lipids, which was associated with high circulating levels of iron.
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PMID:Deteriorating free radical-trapping capacity and antioxidant status in plasma during bone marrow transplantation. 767 Apr 3

The third exon of the c-myc gene contains a CpG site which has been implicated as a regulatory region. When this site is methylated it has protein binding properties and binds a different set of proteins in normal and neoplastic cells. Recent work using myeloma cell lines indicates a correlation between hypomethylation at this site and enhanced expression of the myc protein. We investigated the methylation of this site in 10 cases of myeloma but found that there was no change from the high degree of methylation found in normal cells. Therefore, methylation status at this site is unlikely to serve as a prognosticator in myelomatosis. However, methylation changes at this site were observed in DNA from two cases of CMML, in which hypomethylation was observed and in three AML cases, which were completely methylated at this site.
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PMID:Methylation status within exon 3 of the c-myc gene as a prognostic marker in myeloma and leukaemia. 768 Jul 37

We reported the experience of peripheral blood stem cell transplantation (PBSCT) performed in adult patients with hematological malignancies and solid tumors. After myelosuppressive chemotherapy, peripheral blood stem cells were collected using a Blood Cell Separator (CS-3000) during bone marrow recovery and subsequently cryopreserved in 17 patients (9: malignant lymphoma; 2: ALL; 2: AML; 2: multiple myeloma; 2: solid tumors). In 28 apheresis cases, the collected number of granulocyte/macrophage progenitors (CFU-GM) was more than 5 x 10(5)/kg BW in 17 apheresis cases and ranged between 2 and 5 x 10(5)/kg BW in 4 of such cases. Eleven patients (7: malignant lymphoma; 1: ALL; 1: AML; 1: multiple myeloma; 1: neuroblastoma) underwent PBSCT following myeloablative chemotherapy. The infused number of CFU-GM ranged between 0.6 and 18.1 x 10(5)/kg BW. In 7 patients, more than 5 x 10(5) CFU-GM/kg BW were infused. The median time to reach 500 neutrophils/microliter or 50,000 platelets/microliter was 10 (range: 8-17) and 20 (range: 8-63) days, respectively. One patient died from sepsis before hematologic recovery occurred. Eight patients are alive with no evidence of active disease for 7-19 months after PBSCT. When the infused number of CFU-GM is more than 2 x 10(5)/kg BW, PBSCT following myeloablative chemotherapy seems to be safe and useful treatment.
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PMID:[Peripheral blood stem cell transplantation in adult patients]. 768 Aug 48

In order to estimate the clonality of B-cell lymphoproliferative disorders, polymerase chain reaction (PCR) was used to detect the Ig heavy chain gene rearrangement in DNA extracted from formalin-fixed and paraffin-embedded bone marrow biopsies. 16 out of 19 cases (84%) of B-CLL (n = 9), multiple myeloma (n = 7) and B-non-Hodgkin's lymphoma (n = 3) showed sharp monoclonal bands, while polyclonal smears or no PCR-products were observed in non-neoplastic bone marrow or AML specimens. The results showed that the DNA from paraffin-embedded bone marrow biopsies could be used to detect monoclonal IgH rearrangement by PCR method. This forms the basis for the studies of minimal residual disease or B-ML bone marrow infiltrated diseases.
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PMID:[Detection of B-cell clonality in paraffin-embedded bone marrow biopsy specimens by polymerase chain reaction]. 774 82

We looked for MDM2 gene amplification and over-expression by Southern and Northern blot analysis in 135 and 66 cases of haematological malignancies, including ALL, AML, CML in chronic phase, CLL, MDS, PLL, non-Hodgkin's lymphoma (NHL) and myeloma. No amplification of the gene was found. An over-expression of MDM2 RNA was seen in 9/66 (14%) patients tested, including 3/9 ALL, 3/24 AML, 2/4 myelomas, 1/1 PLL, but 0/2 CML, 0/2 NHL and 0/21 MDS. None of the patients over-expressing MDM2 had modifications of P53 gene transcript or p53 mutations. Most of the patients over-expressing MDM2 gene had poor prognostic features (including 'unfavourable' cytogenetic abnormalities), poor response to chemotherapy and short survival. Our findings suggest that over-expression of MDM2 is seen in a relatively small number of haematological malignancies, and is associated with poor prognosis.
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PMID:Over-expression of the MDM2 gene is found in some cases of haematological malignancies. 780 95

Seventy-three BMT procedures (42 allogeneic-BMT, 30 autologous-BMT, 1 syngeneic transplant) were undertaken at the Shariati Hospital in Tehran between March 1991 and November 1993. Allogeneic-BMT was performed for thalassaemia major (n = 23), AML in complete remission (n = 3), severe aplastic anaemia (n = 7), CML (n = 7), dyskeratosis congenita (n = 2) and Fanconi anaemia (n = 1). Conditioning regimens comprised busulphan (BU) plus cyclophosphamide (CY) or CY only. Thirty-two (78%) of the 43 patients remain alive 1-34 months after BMT. Twelve patients died: the causes of death were haemorrhagic cystitis (n = 1), CMV pneumonitis (n = 1), GVHD (n = 3), infection (n = 3), rejection (n = 1), VOD (n = 2) and hepatitis (n = 1). Autologous-BMT was performed for patients with AML in CR (n = 16), ALL in CR (n = 9), lymphoma in relapse (n = 3), Ewing sarcoma (n = 1) and multiple myeloma (n = 1). The median age was 18 years. Conditioning regimens were Ara C plus CY, etoposide plus CY and high-dose melphalan. Sixteen (54%) of the 30 patients survive, 14 in continuous complete remission. The causes of death were relapse (AML (n = 7), ALL (n = 4), lymphoma (n = 1)), VOD (n = 1) and infection (n = 1).
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PMID:Bone marrow transplantation in Iran. 792 Mar 8

To explore the augmentation of cyclosporin-induced graft-versus-host disease (GVHD) in autologous bone marrow transplantation (BMT), we conducted a phase I dose escalation trial of interferon (IFN)-alpha 2a. A dose of either 1 or 3 x 10(6) units of IFN-alpha 2a was given by daily sc injection starting on day 0 of BMT and continuing for 28 days. Cyclosporine (CYA) was also started on day 0 of BMT at a dose of 1 mg/kg/day for 28 days. We enrolled 22 patients (median age 43 years, range 19-55 years, male/female ratio = 9/13) which included 11 patients with lymphoma, 5 patients with Hodgkin's disease, 4 patients with AML and 1 patient each with acute lymphoblastic leukemia (ALL) and myeloma. Patients were divided into four groups: two control groups received either CYA or IFN-alpha 2a alone and the other two groups received IFN-alpha 2a at a dose of either 1 x 10(6) or 3 x 10(6) units/day sc concomitantly with CYA for 28 days. IFN-alpha 2a treatment was terminated early in 5 patients: 2 patients receiving IFN-alpha 2a at a dose of 3 x 10(6) units/day developed intractable fatigue, nausea and vomiting and 3 other patients had life-threatening transplant-related complications not related to IFN-alpha 2a (1 patient receiving 3 x 10(6) units/day, and 2 receiving 1 x 10(6) units/day). These patients were considered not evaluable. Of the 17 evaluable patients, all 13 who received IFN-alpha 2a developed GVHD regardless of whether they received CYA whereas only 2 of the 4 patients who received CYA alone developed detectable GVHD.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Phase I study of alpha-interferon augmentation of cyclosporine-induced graft versus host disease in recipients of autologous bone marrow transplantation. 805 15

As a first step to evaluate the possibility of gene therapy using adenoviral vectors in hematological malignancies in vivo, we tested the efficacy of gene transfer by a recombinant adenovirus in cell lines and fresh cells from various hematological neoplasms. Thirteen cell lines and samples from 27 patients were studied. Cells were infected by a recombinant adenovirus expressing beta galactosidase gene (Ad RSV betagal) and efficacy of transduction assessed by evaluating betagal expression in cells with a histochemical method. After infection of the cells at a multiplicity of infection (MOI) of 200 p.f.u./cell, the percentage of beta gal-positive cells after 48h was high in two cell lines. K562 (64%) and RPMI 8226 (a myeloma cell line, 65%), relatively large in the two myeloma cell lines tested (41% and 20%, respectively) and in MT4 (an adult T cell leukemia cell line, 38%) and low or absent in other cell lines. In fresh samples from AML, ALL, CLL, NHL, myeloma and MDS, no betagal positive cells were seen 48h and 72h after infection, except in one case of myeloma and one case of CLL (where 10% and 2% of betagal positive cells were seen after infection, respectively). Exposure of fresh malignant cells to GM-CSF before and during adenoviral infection, in three cases, did not increase the number of transfected cells. This suggests that adenoviral vectors, at least in their present form, cannot efficiently be used for direct gene transfer in hematological malignant cells.
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PMID:Differential efficacy of adenoviral mediated gene transfer into cells from hematological cell lines and fresh hematological malignancies. 855 24

Antibodies directed against CD20 (L26, Leu 16, and B1) are frequently used to determine the presence of B lymphocytes. However, recent publications describe the unexpected presence of CD20-positive T cells in the peripheral blood of normal subjects and occasional T-cell neoplasms that express CD20. To determine the presence of CD20-positive T cells in bone marrow, flow cytometric analysis was performed on 34 aspirate specimens (14 normal, 5 acute lymphoblastic lymphoma [ALL], 5 acute myelogenous leukemia [AML], 4 HIV positive, 2 myelodysplastic/myeloproliferative, 2 chronic myelogenous leukemia [CML], 1 chronic lymphocytic lymphoma [CLL], 1 multiple myeloma). A small population of cells coexpressing CD3 (Leu 4) and CD20dim (Leu 16) was identified in 94% of the specimens, representing 0% to 11% (mean 1.77%) of marrow mononuclear cells and 0% to 22.2% (mean 6.54%) of marrow lymphoid cells. There was no correlation between the percentage of CD20-positive T cells and the CD4:CD8 ratio, patient age, gender, or diagnosis. CD20dim positive cells included immature B cells and CD20-positive T cells. Although evaluation of CD20 expression is useful in delineating B-cell processes, caution should be exercised in interpreting its expression on bone marrow T-lymphoid cells. CD20 expression on T cells may be seen in either normal, reactive, or neoplastic processes.
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PMID:CD20 (pan-B cell antigen) expression on bone marrow-derived T cells. 870 37

In a variety of human tumors, including high grade Non-Hodgkin's lymphoma (hgNHL), a linkage between expression of CD44 variant isoforms (CD44v) and tumor progression has been described. In search of an easily accessible diagnostic parameter, expression of CD44 standard (CD44s) and CD44 variant isoforms (exons v5, v6, v7 and v10) in peripheral blood lymphocytes (PBLs) of patients with hematological malignancies was evaluated by fluorescence activated cell scanning. The analysis of 30 blood samples of healthy donors and patients with non-malignant diseases and of 183 blood samples of patients with malignant hematological disorders revealed that only in patients with malignant disorders did a measurable proportion of PBLs express CD44 variant isoforms, mostly exons v5, v6, v7 and, less frequently, exon v10. Elevated levels of CD44v expression were noted in PBLs of patients with acute and chronic myeloid leukemia (AML: 16%, CML: 25%), Hodgkin's disease (HD: 17%), multiple myeloma (MM: 22%), polycythemia vera (PV: 33%), acute lymphoid leukemia (ALL: 23%) and, most frequently, in PBLs of patients with non-Hodgkin's lymphoma (NHL:54%). CD44v expression was not restricted to the malignant phenotype, but instead was also noted in T cells, B cells and monocytes, preferentially in a subpopulation of large cells. Furthermore, expression of CD44v in PBLs was not linked to the histological grading or clinical staging. There was, however, an inverse correlation with tumor progression, whereas response to therapy was frequently accompanied by upregulation of CD44v. Thus, expression of CD44v in the PBLs of patients with NHL mainly reflected immune responsiveness. Since NHL manifests itself primarily in lymphoid organs, its progression is difficult to follow. Monitoring of CD44v in PBLs could be used as an additional and convenient parameter for surveying the course of disease.
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PMID:Expression of CD44 variant isoforms in peripheral blood leukocytes in malignant lymphoma and leukemia: inverse correlation between expression and tumor progression. 896 Jan 9


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