Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:2.1.1.69 (BMT)
 2,655 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Marrow residual disease (RD) in patients with B-cell chronic lymphocytic leukemia (B-CLL) who are in complete remission (CR) after treatment with purine analogues is reported to have a prognostic value, but sample dilution, factors interfering with marrow aspiration, or undetectable immunoglobulin rearrangement can affect the assessment of RD by molecular or immunologic methods. As demonstrated for hairy cell leukemia and follicular lymphoma, bone marrow trephine biopsy specimen immunostaining (BMT/IS) can successfully detect residual malignant cells. The aim of this study was to use BMT/IS and computerized image analysis (CIMA) of bcl-2-positive cells to quantify RD in B-CLL patients in CR, after achievement of CR and more than 1 year later. This methodology was compared with other conventional techniques, i.e., cytologic, flow cytometric, cytogenetic, and molecular analysis. BMT/IS readily detected RD in every trephine biopsy specimen examined, either after CR or at distant follow-up. CIMA allowed an objective quantification of residual B-CLL cells, as evidenced by the correlation with semiquantitative polymerase chain reaction results. Both analyses indicated a progression of RD. This finding was also supported (but inconsistently) by the other techniques. CIMA with an interstitial labeling index, therefore, seems to be a reproducible and sensitive method to detect persistence and progression of RD in patients with B-CLL. This method could apply to other hematologic malignancies infiltrating the bone marrow.
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PMID:Use of image analysis and immunostaining of bone marrow trephine biopsy specimens to quantify residual disease in patients with B-cell chronic lymphocytic leukemia. 1022 4

A 38-year-old man with refractory follicular lymphoma underwent allogeneic BMT from an HLA-identical sibling donor. He had generalized lymphadenopathy, hepatosplenomegaly and lymphoma infiltration of the marrow, all of which disappeared within 3 months following transplantation. Six months post-transplant, progressive hepatomegaly developed in the absence of splenomegaly and lymphadenopathy, and he died from hepatic failure. Autopsy disclosed diffuse large B cell lymphoma of the liver, into which the follicular lymphoma had transformed. Future issues to be investigated should include the optimal timing of allogeneic BMT for low-grade lymphomas.
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PMID:Histologic transformation of follicular lymphoma after allogeneic bone marrow transplantation. 1101 52

The role of allogeneic BMT for follicular lymphoma remains to be established. From 1995 to 2000, 16 patients with follicular lymphoma underwent allogeneic BMT at our center. At the time of transplantation, two patients were in complete remission, 11 in partial remission and three had refractory disease. Fourteen patients were transplanted using a standard myeloablative conditioning regimen and two a nonmyeloablative conditioning regimen. With a median follow-up of 1184 days (range 403-1999 days) after BMT, 11 patients were alive, whereas five died of transplant-related mortality. Eight patients remained in CR 284+ to 1022+ days (median 560+ days) after BMT. Two patients relapsed 63 and 1073 days after BMT. They achieved a further complete remission after salvage treatment and remained alive 403 and 1224 days after BMT, respectively. One patient with autologous reconstitution had never been in CR after BMT. He was retreated with salvage chemotherapy but only achieved CR with subsequent rituximab treatment and was still alive, 1999 days after transplantation. The estimated 2-year overall survival and event-free survival rates were 68% and 55%, respectively. Age greater than 37 years at diagnosis, positive recipient CMV serology and ECOG performance status > or =1 at diagnosis were associated with shorter overall survival (P = 0.05, P = 0.009 and P = 0.03, respectively). Ann Arbor III-IV stage at diagnosis was associated with shorter event-free survival (P < 0.04). Allogeneic BMT seems to be effective for patients with follicular lymphoma. However, the relatively high rate of early transplant-related mortality emphasizes the need to define indications and use prospective protocols involving a less toxic transplant procedure.
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PMID:Allogeneic bone marrow transplantation in patients with follicular lymphoma: a single center study. 1220 39

We report the case of a t(14:18)(+) follicular lymphoma (FL) patient in long-term clinical remission after undergoing an allogeneic bone marrow transplantation (allo-BMT) from a human leukocyte antigen (HLA)-identical sibling donor who was the normal healthy carrier of a t(14:18)(+) B cell clone. Using real-time quantitative PCR (RQ-PCR) and gel electrophoresis, we document the temporal disappearance of the patient's t(14:18)(+) clone early post-transplant with the concomitant emergence and long-term persistence of the donor's t(14:18)(+) clone in the patient's peripheral blood. This report indicates that the use of PCR-based techniques to measure minimal residual disease in FL patients post-alloBMT should incorporate pretransplant screening of the donor for t(14;18). Furthermore, it suggests that healthy individuals with t(14:18) need not be excluded as donors for FL patients treated with allo-BMT.
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PMID:Concurrent presence of both patient and donor t(14;18) in a follicular lymphoma patient after undergoing allogeneic BMT: implications for minimal residual disease detection post-transplant. 1274 76