Axel Glasmacher

University of South Florida, Tampa, FL, United States

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Publications (79)408.43 Total impact

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    ABSTRACT: Multiple myeloma (also known as myeloma or plasma cell myeloma) is a B-cell malignancy or, more precisely, plasma cell neoplasm. This cancer grows inside or outside of bones. The bone damage, or osteolytic lesions, may lead to fractures of the long bones or compression fractures in the spine. The mechanism of bone destruction appears to be related to increased bone resorption by cells called osteoclasts. Bisphosphonates are drugs that can inhibit bone resorption by reducing the number and activity of osteoclasts. This updated review of 20 trials enrolling 6692 patients shows that adding bisphosphonates to myeloma treatment reduces fractures of the vertebra and bone pain. Zoledronate is better than etidronate and placebo alone, but not superior to pamidronate or clodronate for improving overall survival and any other outcomes such as vertebral and nonvertebral fractures.
    Preview · Article · May 2012 · Cochrane database of systematic reviews (Online)
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    ABSTRACT: Thalidomide has potent antimyeloma activity, but no prospective, randomized controlled trial has evaluated thalidomide monotherapy in patients with relapsed/refractory multiple myeloma. We conducted an international, randomized, open-label, four-arm, phase III trial to compare three different doses of thalidomide (100, 200, or 400 mg/day) with standard dexamethasone in patients who had received one to three prior therapies. The primary end-point was time to progression. In the intent-to-treat population (N=499), the median time to progression was 6.1, 7.0, 7.6, and 9.1 months in patients treated with dexamethasone, and thalidomide 100, 200, and 400 mg/day, respectively; the difference between treatment groups was not statistically significant. In the per-protocol population (n=465), the median time to progression was 6.0, 7.0, 8.0, and 9.1 months, respectively. In patients who had received two or three prior therapies, thalidomide significantly prolonged the time to progression at all dose levels compared to the result achieved with dexamethasone. Response rates and median survival were similar in all treatment groups, but the median duration of response was significantly longer in all thalidomide groups than in the dexamethasone group. Adverse events reported in the thalidomide groups, such as fatigue, constipation and neuropathy, confirmed the known safety profile of thalidomide. Although thalidomide was not superior to dexamethasone in this randomized trial, thalidomide monotherapy may be considered an effective salvage therapy option for patients with relapsed/refractory multiple myeloma, particularly those with a good prognosis and those who have received two or three prior therapies. The recommended starting dose of thalidomide monotherapy is 400 mg/day, which can be rapidly reduced for patients who do not tolerate this treatment. (Clinical trial registration number: NCT00452569).
    Full-text · Article · Dec 2011 · Haematologica
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    Preview · Dataset · Nov 2011
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    ABSTRACT: Introduction of lenalidomide has expanded the therapeutic options for refractory and recurrent multiple myeloma (MM) patients. However, the application of the approved doses may be difficult in some patients due to adverse effects. Therefore, we evaluated the efficacy and safety of lenalidomide in 10 patients with relapsed and refractory MM who received a reduced dose due to leukopenia (4), polyneuropathy (1), muscle cramps (1), thrombocytopenia (1), renal insufficiency (1), at the request of patient (1), as continuous therapy (1), either from the beginning (2) or during treatment (8). They received lenalidomide at a mean (median) daily dose of 14 (15) mg/d once a day (days 1-21 every 28 days) in combination with dexamethasone at a mean (median) dose of 17.6 (28) mg per day (4-40 mg) on days 1-4, 9-12 and 17-20. Mean (median) duration of treatment with lenalidomide was 15.1 (15) months. Partial response or better was reported in seven and minimal response or better was reported in eight patients. Mean (median) values for time-to-progression (TTP) and for progression-free survival (PFS) were 8.7 (4) months. Mean overall survival (OS) has not been reached, all patients are still alive. In conclusion, dose-reduced lenalidomide is an effective and well tolerated treatment for patients with recurrent or refractory MM who cannot tolerate full doses.
    Preview · Article · Sep 2011 · German medical science : GMS e-journal
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    ABSTRACT: Antifungal prophylaxis for allogeneic haematopoietic stem-cell transplant (alloHCT) recipients should prevent invasive mould and yeast infections (IFIs) and be well tolerated. This prospective, randomized, open-label, multicentre study compared the efficacy and safety of voriconazole (234 patients) versus itraconazole (255 patients) in alloHCT recipients. The primary composite endpoint, success of prophylaxis, incorporated ability to tolerate study drug for ≥ 100 d (with ≤ 14 d interruption) with survival to day 180 without proven/probable IFI. Success of prophylaxis was significantly higher with voriconazole than itraconazole (48·7% vs. 33·2%, P < 0·01); more voriconazole patients tolerated prophylaxis for 100 d (53·6% vs. 39·0%, P < 0·01; median total duration 96 vs. 68 d). The most common (>10%) treatment-related adverse events were vomiting (16·6%), nausea (15·8%) and diarrhoea (10·4%) for itraconazole, and hepatotoxicity/liver function abnormality (12·9%) for voriconazole. More itraconazole patients received other systemic antifungals (41·9% vs. 29·9%, P < 0·01). There was no difference in incidence of proven/probable IFI (1·3% vs. 2·1%) or survival to day 180 (81·9% vs. 80·9%) for voriconazole and itraconazole respectively. Voriconazole was superior to itraconazole as antifungal prophylaxis after alloHCT, based on differences in the primary composite endpoint. Voriconazole could be given for significantly longer durations, with less need for other systemic antifungals.
    Full-text · Article · Aug 2011 · British Journal of Haematology
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    ABSTRACT: Invasive Candida infections are important causes of morbidity and mortality in immunocompromised and hospitalised patients. This article provides the joint recommendations of the German-speaking Mycological Society (Deutschsprachige Mykologische Gesellschaft, DMyKG) and the Paul-Ehrlich-Society for Chemotherapy (PEG) for diagnosis and treatment of invasive and superficial Candida infections. The recommendations are based on published results of clinical trials, case-series and expert opinion using the evidence criteria set forth by the Infectious Diseases Society of America (IDSA). Key recommendations are summarised here: The cornerstone of diagnosis remains the detection of the organism by culture with identification of the isolate at the species level; in vitro susceptibility testing is mandatory for invasive isolates. Options for initial therapy of candidaemia and other invasive Candida infections in non-granulocytopenic patients include fluconazole or one of the three approved echinocandin compounds; liposomal amphotericin B and voriconazole are secondary alternatives because of their less favourable pharmacological properties. In granulocytopenic patients, an echinocandin or liposomal amphotericin B is recommended as initial therapy based on the fungicidal mode of action. Indwelling central venous catheters serve as a main source of infection independent of the pathogenesis of candidaemia in the individual patients and should be removed whenever feasible. Pre-existing immunosuppressive treatment, particularly by glucocorticosteroids, ought to be discontinued, if feasible, or reduced. The duration of treatment for uncomplicated candidaemia is 14 days following the first negative blood culture and resolution of all associated symptoms and findings. Ophthalmoscopy is recommended prior to the discontinuation of antifungal chemotherapy to rule out endophthalmitis or chorioretinitis. Beyond these key recommendations, this article provides detailed recommendations for specific disease entities, for antifungal treatment in paediatric patients as well as a comprehensive discussion of epidemiology, clinical presentation and emerging diagnostic options of invasive and superficial Candida infections.
    No preview · Article · Jul 2011 · Mycoses
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    ABSTRACT: Invasive fungal infections (IFIs) contribute significantly to mortality and morbidity in patients receiving myelosuppressive chemotherapy for haematological malignancies. The present study investigates the overall survival (OS), infection-related mortality and changes in treatment of IFIs in our department from 1995 until 2006. Outcomes of all chemotherapy courses were retrospectively evaluated using a standard questionnaire. Modified EORTC/MSG criteria for IFIs were applied: a positive PCR result for Aspergillus spp. in bronchoalveolar lavage was also defined as probable IFI. In total, 1693 chemotherapy courses in 592 patients were evaluated. Sixty-three percent of chemotherapy courses were given to treat acute myeloid leukaemia, with the rest for acute lymphoblastic leukaemia or aggressive lymphoma. IFIs were observed in 139/592 patients [23.5%, 95% confidence interval (CI) 20%-27%] and in 149/1693 courses (8.8%, 95% CI 8%-10%). IFI-related mortality was 56.9% in 1995-2001 and 28.6% in 2002-06, P < 0.001. Accordingly, median OS in patients with IFI increased: 54 days (95% CI 26-82 days) in 1995-2001 versus 229 days (95% CI 35-423 days) in 2002-06, P = 0.001. By multivariate analysis, factors predictive for better OS were controlled disease after chemotherapy [hazard ratio (HR) 0.228, P < 0.001], possible IFI (in contrast to proven/probable IFI, HR 0.537, P = 0.005), age <60 years (HR 0.583, P = 0.008), time period 2002-06 (HR 0.612, P = 0.021) and use of novel antifungals (HR 0.589, P = 0.033). Compared with 1995-2001, IFI-related mortality decreased and OS in patients with IFI increased significantly in recent years. Improved OS was associated with controlled haematological disease, certainty of IFI diagnosis (possible), younger age, time period 2002-06 and the use of novel antifungals.
    Preview · Article · Apr 2010 · Journal of Antimicrobial Chemotherapy
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    ABSTRACT: Multiple myeloma (also known as myeloma or plasma cell myeloma) is a B-cell malignancy, or more precisely, plasma cell neoplasm. Multiple myeloma cells migrate to the bone marrow and continuously multiply. Thus, the cancer grows inside or outside of the bones. The bone damage, or osteolytic lesions, may lead to fractures of the long bones or compression fractures in the spine. The mechanism of bone destruction appears to be related to increased bone resorption by cells called osteoclasts. Bisphosphonates are drugs that can inhibit bone resorption by reducing the number and activity of osteoclasts. The review of trials shows that adding bisphosphonates to myeloma treatment reduces fractures of the vertebra (bones in the spine) and bone pain.
    No preview · Article · Mar 2010 · Cochrane database of systematic reviews (Online)
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    ABSTRACT: To evaluate long-term progression-free survival and overall survival, quality of life, and cognitive function in primary central nervous system lymphoma after systemic and intraventricular chemotherapy without radiotherapy. A long-term follow-up was conducted on surviving primary central nervous system lymphoma patients having been enrolled in a pilot/phase II trial between September 1995 and December 2001. Initially, 65 patients (median age, 62 years) had been treated with systemic and intraventricular chemotherapy without radiotherapy. All living patients were contacted, and a neurological examination, comprehensive neuropsychological testing, quality-of-life assessment, and imaging were performed. Twenty-one of all 65 patients (32 %) and 17 of 30 patients 60 years or younger (57%), respectively, were still alive at median follow-up of 100 months (range, 77-149 months). Nineteen of 21 patients completed all investigations; 1 was lost to follow-up. In three patients, an exclusively extraneural relapse of a high-grade non-Hodgkin's lymphoma was diagnosed after 9, 31, and 40 months, respectively. All of them experienced complete remission to high dose. Neither late neurotoxicity nor compromise of quality of life was found in any of the patients examined. Primary polychemotherapy based on high-dose methotrexate (MTX) and cytarabine (Ara-C) is highly efficient in treatment of primary central nervous system lymphoma. About half of patients 60 years or younger can obviously be cured with this regimen without long-term neurotoxic sequelae or quality-of-life compromise.
    Full-text · Article · Feb 2010 · Annals of Neurology
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    ABSTRACT: In primary central nervous system lymphoma (PCNSL), 2 international prognostic scores have been developed to estimate the outcome according to certain "prognostic groups". However, these scores do not predict the individual course of a single patient under therapy. In this analysis, we addressed the question of whether early tumor remission in patients still under therapy, according to magnetic resonance imaging (MRI) criteria, helps to predict long-term outcome. Eighty-eight patients treated with 6 polychemotherapy cycles within a pilot/phase II trial underwent MRI scanning within 72 hours prior to initiation of therapy, after the second chemotherapy cycle, and after completion of chemotherapy. Response was assessed by contrast-enhanced MRI of the brain according to the Macdonald criteria. Median follow-up was 42 months (range, 0-124 months). Patients achieving a complete radiographic response after 2 courses of chemotherapy (n = 18) had a significantly longer median overall survival (OS) (not reached) and median time-to-treatment failure (TTF) (not reached) than patients with complete response (CR) after termination of treatment but with only a partial response after the second cycle (n = 24) (OS: 55 months; TTF: 32 months) (P < .01). Early complete tumor response assessed by MRI after the second of sixth scheduled chemotherapy cycles was highly predictive for both OS and TTF in patients with PCNSL treated in this series.
    Full-text · Article · Feb 2010 · Neuro-Oncology
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    ABSTRACT: Abstract 3028 BackgroundBisphosphonates are used as supportive therapy for patients with multiple myeloma (MM) to prevent bone destruction. There are multiple types of bisphosphonates. Currently, which bisphosphonate is superior to others in the treatment of patients with MM is not known. There are only three randomized controlled trials (RCTs) which employed head to head comparison of bisphsophonates in patients with MM. We performed indirect meta analysis of various bisphohsphonates and did not find the superiority of any particular type of bisphosphonate over others (Mhaskar et al Cochrane Database Syst Rev. 2010 Mar 17;3). In June 2010, Morgan et al published largest RCT to date involving 1960 MM patients employing head to head comparison of zoledronate and clodronate (Morgan et al J Clin Oncol, 2010. 28(15_suppl): p. 8021). Hence, the aim of this analysis is to assess if any specific type of bisphosphonate is superior to others incorporating data from this RCT. MethodsWe extracted data regarding overall survival (OS), progression free survival (PFS), skeletal related events (SREs), and grade III-IV treatment related harms. Superiority of bisphosphonates was assessed by the mixed treatment comparison (MTC) as described by Lu and Ades (Lu et al. Stat Med, 2004. 23(20): p.3105-24). The fixed and random effects MTC models were compared using the deviance information criterion. Network consistency was checked using the back-calculation method. Since there was no evidence suggesting the superiority of random effects model we have reported fixed effects model estimates. ResultsEighteen RCTs were included enrolling 4,970 patients. For the outcome of OS the pooled analysis demonstrated a beneficial effect of zoledronate in comparison with clodronate [HR = 0.83 (95% CI: 0.73 to 0.94)] and etidronate [HR = 0.48 (95% CI: 0.31 to 0.71)]. However, there was no evidence that zoledronate was superior to pamidronate [HR = 0.84 (95% CI: 0.61 to 1.13)], or ibandronate [HR = 0.70 (95% CI: 0.42 to 1.11)] for the outcome of OS. Zoledronate was superior to clodronate [HR = 0.88 (95% CI: 0.78 to 0.99)] for the outcome PFS. Zoledronate was also superior to clodronate [HR = 0.75 (95% CI: 0.64 to 0.88)], pamidronate [HR = 0.65 (95% CI: 0.42 to 0.95)], and ibandronate [HR = 0.44 (95% CI: 0.26 to 0.72)] for the outcome of SREs. There were no significant adverse effects associated with the administration of bisphosphonates. Only three RCTs reported the incidence of osteonecrosis of jaw (ONJ). The incidence of ONJ was higher in zoledronate [OR: 12.03 (95% CI: 3.68 to 39.26)] compared to clodronate. We also identified 7 observational studies evaluating 1068 patients for ONJ. These studies suggest that ONJ may be a common event (range: 0%- 51%). ConclusionThe results demonstrate a beneficial effect of zoledronate on OS compared to clodronate and etidronate. Similarly, zoledronate was superior to clodronate in improving PFS. zoledronate is superior to clodronate, pamidronate and ibandronate in prevention of SREs in patients with MM. In the context of MTC uncertainty analysis, zoledronate ranked as the best treatment followed by clodronate and pamidronate. These finding underscore the need for RCT with head to head comparison of zoledronate and pamidronate for their efficacy and safety in MM patients. View this table: T1500400T1 Table 1 DisclosuresNo relevant conflicts of interest to declare.
    No preview · Article · Jan 2010 · Blood
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    ABSTRACT: There is limited understanding of the dysregulation of the innate immune system in multiple myeloma (MM). We analysed the expression of the activating receptor NKG2D on NK cells and T cells of MM patients and investigated the impact of soluble versus membrane-bound NKG2D ligands on the expression of NKG2D. NKG2D expression on NK cells and CD8+ alphabeta T cells from patients with MM or monoclonal gammopathy of uncertain significance and healthy controls was examined flow-cytometrically. Sera from patients and controls were analysed for soluble NKG2D ligands (sNKG2D ligands). Significantly fewer NK cells and CD8+ alphabeta T cells from patients expressed NKG2D compared to healthy controls (NK cells: median 54% interquartile range (IQR) 32-68 versus 71% IQR 44-82%, P = 0.017, CD8+ alphabeta T cells: median 63% IQR 52-81 versus 77% IQR 71-90%, P = 0.018). The sNKG2D ligand sMICA was increased in patients [median 175 (IQR 87-295) pg/ml] versus controls [median 80 (IQR 32-129) pg/ml, P < 0.001], but levels of sMICA did not correlate with NKG2D expression on effector cells. To elucidate the mechanism of NKG2D down-regulation, we incubated lymphocytes from healthy donors in the presence of sNKG2D ligands or in co-culture with MM cell lines. sNKG2D ligands in clinically relevant concentrations did not down-regulate NKG2D expression, but co-culture of effector cells with myeloma cells with high surface expression of NKG2D ligands reduced NKG2D expression significantly. These results indicate that MM is associated with a significant reduction in NKG2D expression which may be contact-mediated rather than caused by soluble NKG2D ligands.
    No preview · Article · Dec 2009 · Cancer Immunology and Immunotherapy
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    ABSTRACT: Infection is the main treatment-related cause of mortality in cancer patients. Rapid and accurate diagnosis to facilitate specific therapy of febrile neutropenia is therefore urgently warranted. Here, we evaluated a commercial PCR-based kit to detect the DNA of 20 different pathogens (SeptiFast) in the setting of febrile neutropenia after chemotherapy. Seven hundred eighty-four serum samples of 119 febrile neutropenic episodes (FNEs) in 70 patients with hematological malignancies were analyzed and compared with clinical, microbiological, and biochemical findings. In the antibiotic-naïve setting, bacteremia was diagnosed in 34 FNEs and 11 of them yielded the same result in the PCR. Seventy-three FNEs were negative in both systems, leading to an overall agreement in 84 of 119 FNEs (71%). During antibiotic therapy, positivity in blood culture occurred only in 3% of cases, but the PCR yielded a positive result in 15% of cases. In six cases the PCR during antibiotic treatment detected a new pathogen repetitively; this was accompanied by a significant rise in procalcitonin levels, suggestive of a true detection of infection. All patients with probable invasive fungal infection (IFI; n = 3) according to the standards of the European Organization for Research and Treatment of Cancer had a positive PCR result for Aspergillus fumigatus; in contrast there was only one positive result for Aspergillus fumigatus in an episode without signs and symptoms of IFI. Our results demonstrate that the SeptiFast kit cannot replace blood cultures in the diagnostic workup of FNEs. However, it might be helpful in situations where blood cultures remain negative (e.g., during antimicrobial therapy or in IFI).
    Full-text · Article · Aug 2009 · Journal of clinical microbiology
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    ABSTRACT: Evidence bearing on the efficacy of tandem autologous hematopoietic transplant (AHCT) vs a single AHCT in patients with multiple myeloma (MM) is conflicting. We performed a systematic review and meta-analysis to synthesize the existing evidence related to the effectiveness of tandem vs single AHCT in patients with MM. We searched Medline, conference proceedings, and bibliographies of retrieved articles and contacted experts in the field to identify randomized controlled trials (RCTs) reported in any language that compared tandem with single AHCT in patients with MM through March 31, 2008. Endpoints were overall survival (OS), event-free survival (EFS), response rate, and treatment-related mortality (TRM). Data were pooled under a random-effects model. Six RCTs enrolling 1803 patients met the inclusion criteria. Patients treated with tandem AHCT did not have better OS (hazard ratio [HR] for mortality for patients treated with tandem transplant vs single transplant = 0.94; 95% confidence interval [CI] = 0.77 to 1.14) or EFS (HR = 0.86; 95% CI = 0.70 to 1.05). Response rate was statistically significantly better with tandem AHCT (risk ratio = 0.79, 95% CI = 0.67 to 0.93), but with a statistically significant increase in TRM (risk ratio = 1.71, 95% CI = 1.05 to 2.79). There was statistically significant heterogeneity among RCTs for OS and EFS. In previously untreated MM patients, use of tandem AHCT did not result in improved OS or EFS. We conclude that tandem AHCT is associated with improved response rates but at risk of clinically significant increase in TRM.
    Full-text · Article · Feb 2009 · Journal of the National Cancer Institute
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    ABSTRACT: We conducted a phase 1/2 trial combining lenalidomide (R) with adriamycin (A) and dexamethasone (D) for relapsed and relapsed-refractory myeloma to determine tolerability and efficacy of this novel regimen, RAD, delivered for six 28-day cycles. A total of 69 intensively pretreated patients with a median age of 65 years (range, 46-77 years) were enrolled. Using pegfilgrastim (G), the maximum tolerated dose (MTD) was formally not reached at the highest dose level (R, 25 mg on days 1-21; A, 9 mg/m(2) intravenously on days 1-4; and D, 40 mg on days 1-4 and 17-20; dose level 5+G), which was then used to determine efficacy. Grades 3/4 neutropenia and thrombocytopenia were seen in 48% and 38% of patients, respectively. Thromboembolic events occurred in 4.5% and severe infections in 10.5% of patients. On an intent-to treat analysis, overall response rate (ORR) was 73% for the whole study and 77% including 74% complete response (CR) plus very good partial response (VGPR) for dose level 5+G. Response rates and progression-free survival did not differ between relapsed and relapsed-refractory patients. Deletion of chromosome 17p and elevated beta(2)-microglobulin were associated with significantly inferior response and shortened time to progression. In conclusion, RAD induces substantial and durable remission with an acceptable toxicity profile in patients with relapsed and relapsed-refractory myeloma. This trial was registered at www.ClinicalTrials.gov as no. NCT00306813.
    No preview · Article · Feb 2009 · Blood
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    ABSTRACT: Abstract 3858 Poster Board III-794 BackgroundBisphosphonates are currently used as supportive therapy for multiple myeloma (MM). In 2001 we conducted a Cochrane systematic review (SR) showing that Bisphosphonates reduce vertebral fractures and pain but have no effect on other important outcomes. Here we report an update of that SR. MethodsA comprehensive literature search of MEDLINE, EMBASE, LILACS, Cochrane database of randomized controlled trials (RCTs) and www.clinicaltrials.gov and meetings abstracts from American Society of Clinical Oncology, American Society of Hematology and European Hematology Association was undertaken to identify all phase III RCTs published until January 2009. We extracted data regarding overall survival (OS), progression free survival (PFS), vertebral and non vertebral fractures, skeletal related events (SREs), pain, hypercalcemia, grade III-IV treatment related harms. The time to event data and dichotomous data were pooled under the random effects model as hazard ratios (HR) and risk ratios (RR) respectively. Heterogeneity was assessed using the chi square test and I2 statistic. Indirect comparison of various bisphosphonates was conducted according to the methods developed by Bucher and Glenny et al and were extended to calculate HR/RR. ResultsSeventeen RCTs were included enrolling 3,010 patients. In comparison with placebo / no treatment, the pooled analysis demonstrated a beneficial effect of bisphosphonates on prevention of pathological vertebral fractures (7 RCTs, 1116 patients) [RR= 0.74 (95% CI: 0.62 to 0.89), P = 0.001], SREs (6 RCTs, 1334 patients) [RR= 0.81 (95% CI: 0.72 to 0.92), P = 0.001] and on amelioration of pain (8 RCTs, 1281 patients) [RR = 0.75 (95% CI: 0.60 to 0.95), P = 0.01]. We found no significant effect of bisphosphonates on OS, PFS, hypercalcemia or on the reduction of non-vertebral fractures. There was statistically significant heterogeneity for OS and pain endpoints. The heterogeneity for the outcome of pain could be explained by the variation in the pain scales used to measure pain. However, we also found that the beneficial effect of bisphosphonates on pain reduction was greater in patients who were asymptomatic at the start of treatment [RR= 0.28 (95% CI: 0.12 to 0.67)] compared to symptomatic patients [RR= 0.83 (95% CI: 0.69 to 1.00)] (Test of interaction: p = 0.005). The heterogeneity for OS was attributed to one RCT with unrealistic treatment effects ("an outlier effect"). Results of indirect meta analysis were consistent with the results from direct comparisons for the outcomes of vertebral fractures, SREs and pain. The indirect meta analyses did not find the superiority of any particular type of bisphosphonate over others. There were no significant adverse effects associated with the administration of bisphosphonates. In fact, only two RCTs reported osteonecrosis of jaw (ONJ). We also identified 7 observational trials evaluating 1068 patients for ONJ. These studies suggest that ONJ may be a common event (range: 0%- 51%). Since ONJ was only sporadically reported in RCTs the results from observational studies may be an overestimate due to their non-controlled design. ConclusionAdding bisphosphonates to the treatment of MM reduces pathological vertebral fractures, SREs and pain but - from the published evidence - not mortality. Assuming the baseline risk of 20%-50% for vertebral fracture without treatment, we estimate that between 8 - 20 MM patients should be treated to prevent vertebral fracture(s) in one patient. Similarly, assuming the baseline risk of 31%-76% for pain amelioration without treatment, we estimate that between 5 - 13 MM patients should be treated to reduce pain in one patient. Also, with the baseline risk of 35%-86% for SREs without treatment, we estimate that between 6 - 15 MM patients should be treated to prevent SRE(s) in one patient. No bisphosphonate appears to be superior to others. DisclosuresGlasmacher: Celgene: Employment, Equity Ownership.
    Full-text · Article · Jan 2009
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    ABSTRACT: Background: Invasive fungal infections (IFI) are a leading cause of mortality and morbidity in patients (pts) receiving myelosuppressive chemotherapy for hematological malignancies. The aim of the present study was to evaluate the incidence of IFI in our department from 1995 until 2006 and to analyze overall survival and infection-related mortality. Methods: Data of chemotherapy courses given on the leukaemia ward were retrospectively collected with a standard questionnaire. Modified EORTC criteria were applied: A positive PCR for Aspergillus spp. in BAL samples was also defined as probable IFI. Data were analysed using SPSS 14.0.1 and GraphPad InStat V2.05. Results: In total, 1693 courses in 592 pts were evaluated. Most were given to treat acute myeloid leukemia (AML; 63%) or acute lymphoblastic leukemia (ALL, including Burkitt lymphoma; 30%) according to standard treatment protocols. Pts with AML received antifungal prophylaxis with itraconazole while pts with ALL received oral amphotericin B. Median duration of neutropenia was 13 days (range 0-58 d). Death occurred in 214/1693 (12.6%) courses, the cause of death was infection in 156/214 pts (73%). At least one IFI was observed in 139/592 pts (23%), and in 150/1693 (8.9%, 95%CI 8-10%) courses: Forty-two of these were proven, 32 probable and 76 possible IFI. IFI treatment was successful in 87/150 (58%) cases with a median number of treatment days of 17 (range 0-162 d). IFI-related death occurred in 61/150 (41%, 95%CI 33-49%) cases. Mortality due to IFI decreased in the past years: 57% in years < 2002 and 28% in years >= 2002, p<0.001. Conclusions: In years 1995 through 2006, the incidence of IFI in our tertiary care centre was 8.9% with 41%- rate of IFI-related mortality. Interestingly, IFI-related mortality decreased in the past five years.
    No preview · Conference Paper · Oct 2008
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    ABSTRACT: A systemic and intraventricular polychemotherapy regimen (the Bonn protocol) without radiotherapy resulted in durable responses in 75% of patients <60 years with primary CNS lymphoma (PCNSL), but was complicated by a high rate of Ommaya reservoir infections. Here, the efficacy and toxicity of this regimen without intraventricular treatment was evaluated in PCNSL. From August 2003 to November 2005, 18 patients with PCNSL <60 years (median age, 53 years) were treated in a phase II trial with a high-dose methotrexate (MTX; cycles 1, 2, 4 and 5) and cytarabine (Ara-C; cycles 3 and 6) based systemic therapy including dexamethasone, vinca-alkaloids, ifosfamide and cyclophosphamide. Study accrual was prematurely stopped in November 2005 due to a high rate of early relapses. Seventeen of 18 patients were assessable for response: nine (53%) achieved complete response (CR), two (12%) complete response/unconfirmed (CRu) and two (12%) partial response (PR); four (24%) showed progressive disease (PD). One treatment was stopped due to toxicity. Median follow-up was 23 months, median response duration was only 10 months in responding patients, and median time to treatment failure (TTF) was 8 months in the whole group. Median overall survival (OS) has not been reached. Systemic toxicity was mainly hematologic. In PCNSL patients <60 years, polychemotherapy without intraventricular treatment results in a high response rate, but is associated with early relapses in the majority of cases. This is in contrast to the results achieved with the same protocol but with intraventricular treatment.
    Full-text · Article · Oct 2008 · Journal of Neuro-Oncology
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    ABSTRACT: Thalidomide monotherapy in relapsed/refractory multiple myeloma (MM) has a response rate of 30%. The combination of thalidomide with dexamethasone (Thal/Dex) is expected to improve responses, but it is unknown if the combination increases the rate of adverse events. Here, we conducted a systematic review of studies evaluating Thal/Dex in relapsed/refractory MM. Twelve studies were included, comprising 451 patients. The response rate (CR and PR) was 46% (95% CI 42-51%). Therapy-related toxicity was comparable to thalidomide monotherapy and included somnolence (26%, 95% CI 22-31%), constipation (37%, 95% CI 32-42%) and peripheral neuropathy (27%, 95% CI 23-32%). Only venous thromboembolism appeared to occur more often with Thal/Dex (5%, 95% CI 3-8%). Thus, using Thal/Dex results in an improved response rate in relapsed/refractory MM, with a toxicity rate comparable to thalidomide monotherapy.
    Full-text · Article · Oct 2008 · European Journal Of Haematology
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    ABSTRACT: Methotrexate (MTX) is an important anticancer drug and the most efficient chemotherapy component in primary CNS lymphoma (PCNSL). A typical side effect of intravenous high-dose MTX is the occurrence of confluent CNS white matter changes (WMC). Because MTX directly interferes with methionine metabolism, we analyzed the impact of genetic variants of methionine metabolism on the occurrence of WMC as a model of MTX toxicity. In a retrospective analysis of 68 PCNSL patients treated with MTX-based polychemotherapy with (n = 42) or without (n = 26) intraventricular treatment, 10 genetic variants influencing methionine metabolism were analyzed. Pearson's chi(2) test and multinominal regression analysis were used to define the relevance of these genetic variants for the occurrence of WMC. In this patient sample, the occurrence of WMC was significantly predicted by the TT genotype of methylenetetrahydrofolate reductase c.677C>T (chi(2) = 8.67; p = 0.013; df = 2), the AA genotype of methylenetetrahydrofolate reductase c.1298A>C (chi(2) = 13.5; p = 0.001; df = 2), and the GG genotype of transcobalamin 2 c.776C>G (chi(2) = 19.73; p < 0.001), in addition to male gender (chi(2) = 11.95; p = 0.001). These data strengthen the hypothesis that MTX effects are influenced by methionine metabolism, which may offer new strategies to improve MTX-based therapies.
    Full-text · Article · Sep 2008 · Neuro-Oncology

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3k Citations
408.43 Total Impact Points

Institutions

  • 2012
    • University of South Florida
      • Center for Evidence Based Medicine and Health Outcomes Research
      Tampa, FL, United States
  • 2000-2011
    • University of Bonn
      • • Medizinische Klinik und Poliklinik II
      • • Medizinische Klinik und Poliklinik I
      Bonn, North Rhine-Westphalia, Germany
  • 2008
    • University of Bonn - Medical Center
      Bonn, North Rhine-Westphalia, Germany
  • 2005
    • Universitair Ziekenhuis Leuven
      Louvain, Flanders, Belgium
  • 2004
    • Medical College of Wisconsin
      Milwaukee, Wisconsin, United States
    • University of Cologne
      Köln, North Rhine-Westphalia, Germany
  • 2002
    • University of Birmingham
      Birmingham, England, United Kingdom