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

Systemic sclerosis is uncommonly associated with hematologic malignancies. We report the case of a patient who had chronic myelogenous leukemia 3 years after the CREST variant of systemic sclerosis was diagnosed. She also later had porphyria cutanea tarda. The majority of patients who had hematologic malignancies after the diagnosis of systemic sclerosis proved to have either multiple myeloma or chronic lymphocytic leukemia. Hematologic malignancies may be found in patients with systemic sclerosis (either limited or diffuse).
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PMID:Chronic myelogenous leukemia and porphyria cutanea tarda in a patient with limited systemic sclerosis. 959 64

The proteasome inhibitor bortezomib (VELCADE; formerly PS-341, LDP-341, MLN341) is a novel dipeptide boronic acid. In cell culture and xenograft models, bortezomib showed potent activity, enhanced the sensitivity of cancer cells to traditional chemotherapeutics, and appeared to overcome drug resistance. In vitro, bortzomib downregulated the NF-kappaB pathway. NF-kappaB is a transcription factor that enhances the production of growth factors (e.g., IL-6), cell-adhesion molecules, and anti-apoptotic factors, all of which contribute to the growth of the tumor cell and/or protection from apoptosis. Phase II trials have been conducted in patients with relapsed and refractory multiple myeloma (SUMMIT trial, 202 patients) or relapsed myeloma (CREST trial, n=54) using a 1.3mg/m(2) dose given twice weekly for 2 weeks (days 1, 4, 8, 11; rest days 12-21). Both trials showed responses (including complete responses) with manageable toxicities, forming the basis for an ongoing phase III trial comparing response to bortezomib versus high-dose dexamethasone.
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PMID:Clinical update: proteasome inhibitors in hematologic malignancies. 1273 41

The proteasome is responsible for the degradation of intracellular proteins, including several involved in cell cycle control and the regulation of apoptosis. Preclinical studies have shown that the proteasome inhibitor bortezomib decreases proliferation, induces apoptosis, enhances the activity of chemotherapy and radiation, and reverses chemoresistance in a variety of hematologic and solid malignancy models in vitro and in vivo. Proteasome inhibition with bortezomib has specifically promoted apoptosis of tumor cells through the stabilization of p53, p21, p27, Bax, and IkappaBalpha, resulting in nuclear factor kappaB inhibition. Bortezomib was the first proteasome inhibitor to enter clinical trials. In two Phase II trials, SUMMIT and CREST, it was found that treatment with bortezomib, alone or in combination with dexamethasone, produced durable responses with meaningful survival benefits in patients with recurrent and/or refractory multiple myeloma. In the APEX Phase III trial, bortezomib produced significant survival benefits and improved response rates over high-dose dexamethasone at first recurrence and beyond in patients with multiple myeloma. Clinical trials evaluating the safety and activity of bortezomib alone or in combination regimens with dexamethasone, doxorubicin, melphalan, prednisone, and/or thalidomide in the treatment of patients with newly diagnosed multiple myeloma have shown encouraging results. Preliminary studies suggest that bortezomib may serve as induction therapy before stem cell transplantation. Proteasome inhibition with bortezomib also has shown activity with manageable toxicity in mantle cell and other lymphomas, leukemias, and solid malignancies, including nonsmall cell lung carcinoma. Further studies with bortezomib as monotherapy and in combination regimens in the treatment of solid and hematologic malignancies are warranted.
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PMID:Proteasome inhibition and its clinical prospects in the treatment of hematologic and solid malignancies. 1617 3

Proteasome inhibition is a novel approach to treating malignancy, and bortezomib is the first proteasome inhibitor in this class to be approved for clinical use. In preclinical studies, bortezomib caused cell cycle arrest and apoptosis in myeloma and lymphoma cell lines as well as in other neoplastic cell types. Phase I clinical trials established an optimal dosing strategy and demonstrated a manageable toxicity profile. Cyclical thrombocytopenia and peripheral neuropathy, which generally abate after cessation of treatment, are the most clinically significant toxicities. Two phase II trials, SUMMIT and CREST, demonstrated impressive activity with bortezomib 1.3 mg/m2 monotherapy in relapsed and refractory myeloma, with an impressive 35% response rate (complete+partial+minimal responses) in SUMMIT and a 50% response rate in CREST, using the rigorous European Group for Blood and Marrow Transplantation criteria. A recently completed phase III trial showed the significant clinical benefits of bortezomib over high-dose dexamethasone in patients with relapsed myeloma. Results of ongoing trials with bortezomib in the first-line treatment of myeloma have been extremely encouraging and have demonstrated the benefit of using bortezomib as part of an induction regimen prior to stem cell transplantation. Importantly, two clinical trials with bortezomib as monotherapy in refractory non-Hodgkin's lymphoma have shown impressive response rates, particularly in aggressive mantle cell lymphoma.
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PMID:Bortezomib, a novel proteasome inhibitor, in the treatment of hematologic malignancies. 1629 74

Systemic sclerosis is a chronic multisystem disorder of unknown etiology characterized by the involvement of skin and visceral organs caused by an accumulation of collagen. It has been reported that the incidence of solid and hematological malignancy increased in systemic sclerosis. Multiple myeloma and chronic lymphocytic leukemia are the most common hematological malignancies seen in patients with systemic sclerosis. Chronic myeloid leukemia (CML) has only rarely been reported so far. We here report a case with CREST (calcinosis, Raynaud's phenomenon, esophageal dysfunction, sclerodactly, telangiectasia) who developed CML 7 years after the onset of CREST. Ours is the second case with CML developing after the onset of CREST in the literature. We also briefly discuss the possible tendency to hematological malignancy in systemic sclerosis.
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PMID:Scleroderma and chronic myeloid leukemia: a sheer coincidence, a consequence of long lasting D-penicillamine therapy or a plausible relationship of both diseases? 1687 7

The Clinical Response and Efficacy Study of Bortezomib in the Treatment of Relapsing Multiple Myeloma (CREST) demonstrated substantial activity with two dose levels of bortezomib (1.0 and 1.3 mg/m(2)), alone or with dexamethasone, in relapsed or refractory multiple myeloma. We present updated survival analyses after prolonged follow-up (median >5 years). One- and 5-year survival rates were 82% and 32%, respectively, in the 1.0 mg/m(2) group (n = 28), and 81% and 45%, respectively, in the 1.3 mg/m(2) group (n = 26). Notable survival, response, and time-to-progression data suggest that a bortezomib starting dose of 1.3 mg/m(2) is preferred. If bortezomib dose reduction is required, the 1.0 mg/m(2) dose still offers patients a substantial survival benefit.
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PMID:Updated survival analyses after prolonged follow-up of the phase 2, multicenter CREST study of bortezomib in relapsed or refractory multiple myeloma. 1878 99

Bortezomib therapy has become an important part of the standard of care for patients with relapsed multiple myeloma, and preliminary clinical evidence suggests that bortezomib retreatment in patients previously treated with the drug may prolong disease control. This retrospective study was designed to clarify the utility of bortezomib as a repeat therapy. We reviewed records from 3 major cancer centers that had participated in the phase II (SUMMIT or CREST) or phase III (APEX) registration studies to identify patients who were subsequently retreated off protocol with bortezomib-based therapy. We found 22 patients who received bortezomib retreatment following a 60 or more day gap between bortezomib treatments. Twelve patients had intervening therapy between initial bortezomib treatment and bortezomib retreatment. During retreatment, 14 of 22 patients received bortezomib in combination with another antineoplastic agent. The overall response rate for bortezomib retreatment was 50% (9% complete responses). The median length of retreatment was 5.1 months in responding patients and 2.4 months in nonresponding patients. Therapy was terminated due to unmanageable toxicity in 2 patients during retreatment, compared with 6 patients during initial treatment. During retreatment, no patients required dose reduction due to peripheral neuropathy, compared to 4 patients during their initial treatment. Thus, bortezomib retreatment appears to be safe and effective. Favorable observed response rates with bortezomib retreatment suggest that it may be a viable option for relapsed or refractory multiple myeloma, even in patients previously exposed to bortezomib.
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PMID:Utility of bortezomib retreatment in relapsed or refractory multiple myeloma patients: a multicenter case series. 1899 66

Bortezomib (VELCADE) is a proteasome inhibitor that not only targets the myeloma cell, but also acts in the bone marrow micro-environment, inhibiting the binding of myeloma cells to bone marrow stromal cells, as well as demonstrating anabolic effects on bone. Intravenous bortezomib, with or without dexamethasone, is effective and well tolerated in patients with relapsed/refractory multiple myeloma, as demonstrated in the phase II CREST and SUMMIT trials, and the phase III APEX trial, and is a recommended treatment for this patient group. Based on the results of another phase III trial, the combination of bortezomib plus pegylated liposomal doxorubicin is also a recommended treatment for patients with relapsed/refractory multiple myeloma. Other bortezomib-combination regimens have demonstrated promising response data in phase II trials in patients with relapsed/refractory disease, although response and survival data for these combinations need to be confirmed in larger phase III trials. Bortezomib was effective and well tolerated when used as part of a first-line regimen in previously untreated patients with multiple myeloma. In the phase III VISTA trial in elderly patients with previously untreated multiple myeloma not eligible for transplantation, bortezomib in combination with melphalan and prednisone was effective and well tolerated and is a recommended treatment regimen for this group of patients. Preliminary data from phase II/III trials in patients with previously untreated multiple myeloma indicate a promising role for the use of bortezomib combined with various other chemotherapeutic agents as induction therapy prior to transplantation.
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PMID:Bortezomib: a review of its use in patients with multiple myeloma. 1944 72

Multiple myeloma is an incurable hematologic cancer affecting over 50,000 Americans. Current treatment approaches employ various chemotherapeutic regimens; however, relapse is inevitable. A novel treatment for multiple myeloma is bortezomib, a proteasome inhibitor that has shown significant in vitro and in vivo activity. Bortezomib, recently approved by the FDA, has activity in patients with relapsed and refractory multiple myeloma. A clinical update from the SUMMIT and CREST phase II trials is presented; overall response rates were 35% and 38%, respectively, for the 1.3 mg/m2 dose of bortezomib. Side effects, including thrombocytopenia and peripheral neuropathy, are generally manageable APEX, a phase III trial of bortezomib compared to high-dose dexamethasone in multiple myeloma patients who had received 1-3 prior therapies, was stopped early due to superior efficacy on the bortezomib arm.
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PMID:Proteasome inhibition for treatment of multiple myeloma: clinical update. 1979 31