Bortezomib is associated with better health-related quality of life than high-dose dexamethasone in patients with relapsed multiple myeloma: results from the APEX study

Unmasking Infection Risks in Multiple Myeloma: Insights from a Retrospective Analysis

Multiple myeloma (MM) has witnessed significant therapeutic advancements through the introduction of proteasome inhibitors and immunomodulators, leading to improved treatment outcomes. However, infections remain a formidable challenge for MM patients. The objective of our research is to investigate the factors that can forecast infection risk in MM patients. In pursuit of this, we conducted a thorough retrospective examination of medical records from Kidwai Memorial Institute of Oncology, Bangalore, involving 145 MM patients. Out of the 145 patients analyzed, almost half (47.5%; n = 69) encountered at least one infection during the course of their disease. Respiratory-related infections were the most prevalent (76.2%), followed by urinary tract infections (10%) and instances of diarrhea (8.8%). Notably, gram-positive bacteria constituted the majority of identified causative organisms, accounting for 48.2% of isolated pathogens, while gram-negative bacteria comprised 37.9% of the isolated organisms. Most infections were observed either at the time of presentation or during the first month (40.5%). Overall mortality during the study period was 4.8% (n = 7). Infections contributed to 57.1% (n = 4 out of 7 deaths) of the mortality. Moreover, patients in advanced stages exhibited an elevated risk of infection at presentation. Infections remain a major cause of morbidity and mortality in patients with MM. Nearly half of MM patients experience an episode of infection during treatment.Gram-positive bacteria are the most common pathogens, with respiratory infections being the most common foci. Prompt identification and treatment of infections is essential, but can be challenging due to atypical or absent symptoms. Antibacterial prophylaxis is an important preventive strategy, but further research is needed to develop innovative approaches to infection prevention and targeted therapeutic interventions. We must strive to develop innovative approaches to infection prevention in MM patients. Also we need to advance our understanding of the interplay between infections and MM to improve quality of care and outcomes for these individuals. By addressing these challenges, we can aspire to offer MM patients a brighter and healthier future.

The impact of current therapeutic options on the health-related quality of life of patients with relapse/refractory multiple myeloma: a systematic review of clinical studies

PURPOSE

Patients with relapse and/or refractory multiple myeloma (RRMM) have a high disease burden with poor health-related quality of life (HRQoL) which worsens with each additional relapse. We aimed to review the impact of triplet, doublet, monotherapies, and salvage autologous stem cell transplantation on the HRQoL of RRMM patients.

METHODS

We performed a comprehensive literature search of Medline/PubMed, Wiley Cochrane Library, EMBASE, Scopus, CINAHL, and Clinicaltrials.gov to identify clinical studies in RRMM patients with HRQoL as an outcome measure. The ISOQoL and CONSORT-PRO extension guidelines were used to assess the quality of HRQoL reporting. We synthesized the result using a qualitative analysis.

RESULTS

A total of 10,245 RRMM patients enrolled in 28 eligible studies received either a triplet, doublet regimen, monotherapy, or salvage autologous stem cell transplantation. The EORTC QLQ-C30 was the most used questionnaire, and compliance with HRQoL reporting standards is generally poor among studies without an additional HRQoL publication. Most of the current therapeutic options are at best able to maintain HRQoL at baseline but not improve it. The methodological and reporting heterogeneity among the studies complicates generalizations.

CONCLUSIONS

Many of the current treatment regimens for RRMM have demonstrated clinical effectiveness in trials. Unlike newly diagnosed MM, these regimens are less likely to result in significant improvement in HRQoL in RRMM. This should be communicated to patients before initiating therapies.

IMPLICATIONS FOR CANCER SURVIVORS

Individualized therapeutic approach for RRMM should be chosen based on a shared decision-making process that aligns clinical efficacy with patients' treatment priorities and HRQoL.

Symptom burden and its functional impact in patients with "symptomatic" relapsed or refractory multiple myeloma

PURPOSE

Relapsed or refractory multiple myeloma (RRMM) is labeled "symptomatic" based on laboratory values, but not relevant to quantitative measure of patient's perspectives. This study aimed to describe symptom burden, health status, and quality of life in RRMM patients.

METHODS

The cross-sectional study included 184 MM patients (141 RRMM cases and 43 MM patients on follow-up without diagnosis/treatment of RRMM disease as controls), while 64 RRMM patients also provided longitudinal patient-reported outcomes (PROs) data. Symptomatic status was based on clinical measures of disease activity. PROs included the MD Anderson Symptom Inventory multiple myeloma module (MDASI-MM), single-item quality of life (SIQOL), and EuroQol-5D (EQ-5D). Wilcoxon rank test and effect size were used for comparisons. Regression models were used to describe symptom trajectory and to identify predictors of high symptom burden during 3 months of RRMM therapy.

RESULTS

Most patients were clinically identified as symptomatic (93%). RRMM patients tended to report more severe symptoms, with significantly lower QOL scores and more severe fatigue, poor appetite, and lower enjoyment of life compared with controls (all p < 0.05). In RRMM patients, lower hemoglobin and higher B-2 microglobulin levels significantly correlated with higher burdens of fatigue, pain, and muscle weakness and also with lower QOL and EQ-5D scores (all p < 0.05). During RRMM therapy, being female, with any comorbidity, ≥ 65 years old, and ≥ 5 years MM history, contributed to high symptoms burden and poor QOL status (each p < 0.05).

CONCLUSIONS

MDASI-MM modules were sensitive to detect the RRMM-related symptoms burden, which correlated with objective clinical measures. RRMM patients reported a more compromised QOL.

How are patient-reported outcomes and symptoms being measured in adults with relapsed/refractory multiple myeloma? A systematic review

PURPOSE

Patients with relapsed and/or refractory multiple myeloma (RRMM) are living longer due in part to changing treatment patterns. It is important to understand how changing treatment patterns affect patients' lives beyond extending survival. Research suggests that direct patient report is the best way to capture information on how patients feel and function in response to their disease and its treatment. Therefore, the purpose of this review is to summarize evidence of patients' experience collected through patient-reported outcomes (PRO) in RRMM patients, and to explore PRO reporting quality.

METHODS

We conducted a systematic search to identify manuscripts reporting PROs in RRMM and summarized available evidence. We assessed PRO reporting quality using the Consolidated Standards of Reporting Trials (CONSORT) PRO Extension checklist.

RESULTS

Our search resulted in 30 manuscripts. Thirteen unique PRO measures were used to assess 18 distinct PRO domains. Pain, fatigue, and emotional function were commonly assessed domains though reporting formats limited our ability to understand prevalence and severity of PRO challenges in RRMM. Evaluation of PRO reporting quality revealed significant reporting deficiencies. Several reporting criteria were included in less than 25% of manuscripts.

CONCLUSIONS

Existing evidence provides a limited window for understanding the patient experience of RRMM and is further limited by suboptimal reporting quality. Observational studies are needed to describe prevalence, severity and patterns of PROs in RRMM overtime. Future studies that incorporate PROs would benefit from following existing guidelines to ensure that study evidence and conclusions can be fully assessed by readers, clinicians and policy makers.

Health-Related Quality of Life and Satisfaction With Health Care: Relation to Clinical Stage in Mexican Patients With Multiple Myeloma

Multiple myeloma (MM) is characterized by bone pain, pathologic fractures, bone destruction, and secondary hypercalcemia, all these conditions impact on health-related quality of life of patients. The objective was to evaluate the global health state and health-related quality of life in a group of patients with MM who attended a tertiary health-care center of the Instituto Mexicano del Seguro Social in Mexico, through the questionnaires designed by European Organization for Research and Treatment of Cancer (EORTC) quality of life group. Exploratory cross-sectional study in patients with MM treated in a Department of Hematology in a High-Specialty Medical Unit was conducted. Patients older than 18 years of age, men and women, were selected, and their informed written consent was obtained. We included all consecutive cases treated from January 2012 to December 2014. Questionnaires EORTC QLQ-C30, EORTC QLQ-MY20, and EORTC IN-PATSAT-32 were used. We studied 37 patients, 19 (51%) men and 18 women. The mean age was 61.9 years. Twenty-two (59.46%) patients presented with clinical stage III. The mean time for diagnosis was 33.11 months. The most used first-line treatment schedule was melphalan/prednisone/thalidomide (15; 40%). The global health median was 66.67, and symptoms showed a median score of 22.22. Treatment side effects score was 16.67; for general satisfaction, the median score was 75. In conclusion, the patients showed an advanced clinical stage and poor prognosis but had scores higher than 50 in functional scales and lower than 50 for symptom scales. The scores for symptom scales were related to age, renal failure, and disease-free survival. Identification of quality of life and satisfaction of care markers allow for early therapeutic intervention and efficiency and enable a change in quality of life and perception of care in Health Services.

Health-related quality of life in the ENDEAVOR study: carfilzomib-dexamethasone vs bortezomib-dexamethasone in relapsed/refractory multiple myeloma

We examined effects of carfilzomib-dexamethasone (Kd56) versus bortezomib-dexamethasone (Vd) on health-related quality of life (HR-QoL) in relapsed/refractory multiple myeloma (MM) patients from the ENDEAVOR study. HR-QoL was assessed by the European Organisation for Research and Treatment of Cancer QoL Questionnaire (QLQ-C30), MM-specific module (QLQ-MY20), and Functional Assessment of Cancer Therapy/Gynecologic Oncology Group-Neurotoxicity (FACT-GOG-Ntx) “Additional Concerns” neurotoxicity subscale. The QLQ-C30 Global Health Status (GHS)/QoL scale and seven prespecified subscales were compared between groups using mixed model for repeated measures. Of 929 randomized patients, 911 with ≥1 post-baseline assessment were included. Kd56 was associated with statistically significant improvements in GHS/QoL, fatigue, pain, side effects, and FACT/GOG-Ntx scores versus Vd, although mean differences did not meet thresholds for clinical significance. The Kd56 group had longer time to deterioration (TTD) in GHS/QoL (median 3.7 versus 2.8 months, p = 0.0046), physical function (5.6 versus 3.7 months, p = 0.0390), nausea/vomiting (17.6 versus 8.2 months, p = 0.0358), side effects (6.4 versus 3.7 months p < 0.0001), and FACT/GOG-Ntx (11.1 versus 5.5 months, p = 0.0004). Overall, Kd56 resulted in statistically but not clinically significant improvements in mean GHS/QoL scores versus Vd. Treatment with Kd56 versus Vd also significantly prolonged TTD in GHS/QoL, physical function, nausea/vomiting, side effects, and FACT/GOG-Ntx.

Methodological aspects of health-related quality of life measurement and analysis in patients with multiple myeloma

Multiple myeloma (MM) is an incurable but treatment-sensitive cancer. For most patients, this means treatment with multiple lines of anti-myeloma therapy and a life with disease- and treatment-related symptoms and complications. Health-related quality of life (HRQoL) issues play an important role in treatment decision-making. Methodological challenges in longitudinal HRQoL measurements and analyses have been identified, including non-responses (NR) to scheduled questionnaires. Publications were identified for inclusion in a systematic review of longitudinal HRQoL studies in MM, focussing on methodological aspects of HRQoL measurement and analysis. Diversity in timing of HRQoL data collection and applied statistical methods were noted. We observed a high rate of NR, but the impact of NR was investigated in only 8/23 studies. Thus, evidence-based knowledge of HRQoL in patients with MM is compromised. To improve quality of HRQoL results and their implementation in daily practice, future studies should follow established guidelines.

Clarithromycin added to bortezomib-cyclophosphamide-dexamethasone impairs health-related quality of life in multiple myeloma patients

OBJECTIVES

The Danish Myeloma Study Group initiated a randomized, placebo-controlled, double-blinded phase II study to investigate the efficacy of adding clarithromycin to cyclophosphamide-bortezomib-dexamethasone (VCD) induction therapy in transplant eligible, newly diagnosed multiple myeloma patients. The study was prematurely terminated due to severe complications, and no effect of adding clarithromycin was found. The aim of this study was to compare health-related quality of life (HRQoL) between the two groups and to explore the coherence hereof with adverse event (AE) registration by clinicians.

METHODS

Patients completed three validated HRQoL questionnaires at inclusion, before cyclophosphamide priming, and two months after high-dose therapy (HDT). The mean score difference was interpreted by clinically relevant differences between groups. Spearman's correlation analysis was used to compare patient-reported toxicities with AEs.

RESULTS

Of 58 included patients, 55 participated in the HRQoL reporting. Before cyclophosphamide priming, patients in the clarithromycin group reported clinically relevant reduced HRQoL for eleven domains with persistent reduction in four domains two months after HDT. Poor correlation between patient-reported toxicities and clinician-reported AEs was observed.

CONCLUSIONS

Despite the premature study termination, our data demonstrate impaired HRQoL when clarithromycin was added to the VCD regimen. We found clear underreporting of toxicities by clinicians. ClinicalTrials.gov number NCT02573935.

Patient-reported outcomes in relapsed/refractory multiple myeloma: a systematic review

PURPOSE

We performed a systematic review to quantify the amount of evidence-based data available on patient-reported outcomes (PRO) in Relapsed/Refractory Multiple Myeloma (RRMM) patients and to examine the added value of such studies in supporting clinical decision-making.

METHODS

We conducted a search in PubMed/Medline and the Cochrane Library to identify studies published between January 1990 and May 2017. All studies, regardless of the design, including patients with RRMM and also evaluating PRO were considered. For each study, we collected both PRO and traditional clinical outcomes, such as survival and toxicity information, based on a predefined data extraction form.

RESULTS

After having screened 1680 records, 11 studies were identified and these included six randomized controlled trials (RCT). Overall, there were five studies focusing on proteasome inhibitors (PIs), four on immunomodulatory drugs (IMiDs), one on both PIs and IMiDs, and one on monoclonal antibodies. Considering only RCTs, it was found that primary clinical efficacy endpoints frequently favored experimental arms, while (physician-reported) toxicity data did not. However, inspection of PRO data revealed novel information that often contrasted with standard toxicity, for example, by not indicating worse quality of life outcomes or symptom severity for patients enrolled in the experimental arms.

CONCLUSIONS

There is paucity of evidence-based data regarding the impact of therapies on quality of life and symptom burden of patients with RRMM. Inclusion of PRO in future studies of patients with RRMM is needed to better inform clinical decision-making.

Patient-Reported Physical Function Measures in Cancer Clinical Trials

Patient-reported outcomes (PROs) are increasingly used to monitor treatment-related symptoms and physical function decrements in cancer clinical trials. As more patients enter survivorship, it is important to capture PRO physical function throughout trials to help restore pretreatment levels of function. We completed a systematic review of PRO physical function measures used in cancer clinical trials and evaluated their psychometric properties on the basis of guidelines from the US Food and Drug Administration. Five databases were searched through October 2015: PubMed/MEDLINE, EMBASE, CINAHL (Cumulative Index of Nursing and Allied Health Literature), Health and Psychosocial Instruments, and Cochrane. From an initial total of 10,233 articles, we identified 108 trials that captured PRO physical function. Within these trials, approximately 67% used the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire and 25% used the Medical Outcomes Study Short Form 36. Both the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire and Medical Outcomes Study Short Form 36 instruments generically satisfy most Food and Drug Administration requirements, although neither sought direct patient input as part of item development. The newer Patient-Reported Outcomes Measurement Information System physical function short form may be a brief, viable alternative. Clinicians should carefully consider the psychometric properties of these measures when incorporating PRO instrumentation into clinical trial design to provide a more comprehensive understanding of patient function.

The Value of Patient Reported Outcomes and Other Patient-Generated Health Data in Clinical Hematology

With cures and long-term survival rates increasing in hematologic malignancies, increased focus has been placed on gaining a better understanding of the patient experience from disease and treatment effects. This has been the basis for the utilization of patient reported outcomes (PRO) and other patient-generated health data (PGHD) in efforts to improve long-term health-related quality of life (HRQOL). This review will summarize the impact PROs have had on the evolving standard of care for patients with hematologic malignant conditions and will conclude with a template for the integration of PRO and PGHD to enhance the patient experience, using stem cell transplantation as an example.

Corticosteroids for the management of cancer-related pain in adults

BACKGROUND

One of the most feared symptoms associated with cancer is pain. Opioids remain the mainstay of pain treatment but corticosteroids are often used concurrently as co- or adjuvant analgesics. Due to their anti-inflammatory mechanism of action, corticosteroids are said to provide effective analgesia for pain associated with inflammation and in the management of cancer-related complications such as brain metastasis and spinal cord compression. However, corticosteroids have a wide range of adverse effects that are dose and time dependent.

OBJECTIVES

To evaluate the efficacy of corticosteroids in treating cancer-related pain in adults.

SEARCH METHODS

We searched the Cochrane Central Register of Controlled Trials (CENTRAL 2014, Issue 4), MEDLINE (OVID) (1966 to 29 September 2014), EMBASE (OVID) (1970 to 29 September 2014), CINAHL (1982 to 29 September 2014), Science Citation Index (Web of Science) (1899 to 29 September 2014) and Conference Proceedings Citation Index - Science (Web of Science) (1990 to 29 September 2014).

SELECTION CRITERIA

Any randomised or prospective controlled trial that included patients over 18 years with cancer-related pain were eligible for the review. Corticosteroids were compared to placebo or usual treatment and/or supportive care.

DATA COLLECTION AND ANALYSIS

All review authors independently assessed trial quality and extracted data. We used arithmetic means and standard deviations for each outcome to report the mean difference (MD) with 95% confidence interval (CI).

MAIN RESULTS

Fifteen studies met the inclusion criteria, enrolling 1926 participants. The trial size varied from 20 to 598 patients. Most studies compared corticosteroids, particularly dexamethasone, to standard therapy. We included six studies with data at one week in the meta-analysis for pain intensity; no data were available at that time point for the remaining studies. Corticosteroid therapy resulted in less pain (measured on a scale of 0 to 10 with a lower score indicating less pain) compared to control at one week (MD 0.84 lower pain, 95% CI 1.38 to 0.30 lower; low quality evidence). Adverse events were poorly documented. Factors limiting statistical analysis included the lack of standardised measurements of pain and the use of different agents, dosages, comparisons and routes of drug delivery. Subgroup analysis according to type of cancer was not possible. The quality of this evidence was limited by the risk of bias of the studies and small sample size. The results were also compromised by attrition, with data missing for the enrolled patients.

AUTHORS' CONCLUSIONS

The evidence for the efficacy of corticosteroids for pain control in cancer patients is weak. Significant pain relief was noted in some studies, albeit only for a short period of time. This could be important for patients with poor clinical status. Further trials, with increased numbers of participants, are needed to evaluate the safety and effectiveness of corticosteroids for the management cancer pain in adults, and to establish an ideal dose, duration of therapy and route of administration.

Expert panel consensus statement on the optimal use of pomalidomide in relapsed and refractory multiple myeloma

In this report, a panel of European myeloma experts discuss the role of pomalidomide in the treatment of relapsed and refractory multiple myeloma (RRMM). Based on the available evidence, the combination of pomalidomide and low-dose dexamethasone is a well-tolerated and effective treatment option for patients with RRMM who have exhausted treatment with lenalidomide and bortezomib. The optimal starting dose of pomalidomide is 4 mg given on days 1-21 of each 28-day cycle, whereas dexamethasone is administered at a dose of 40 mg weekly (reduced to 20 mg for patients aged >75 years). The treatment should continue until evidence of disease progression or unacceptable toxicity. Dose-modification schemes have been established for patients who develop neutropenia, thrombocytopaenia and other grade 3-4 adverse events during pomalidomide therapy. Guidance on the prevention and management of infections and venous thromboembolism is provided, based on the available clinical evidence and the experience of panel members. The use of pomalidomide in special populations, such as patients with advanced age, renal impairment or unfavourable cytogenetic features, is also discussed.

Bortezomib in multiple myeloma: systematic review and clinical considerations

We conducted a systematic review to determine the appropriate use of bortezomib alone or in combination with other agents in patients with multiple myeloma (mm). We searched medline, embase, the Cochrane Library, conference proceedings, and the reference lists of included studies. We analyzed randomized controlled trials and systematic reviews if they involved adult mm patients treated with bortezomib and if they reported on survival, disease control, response, quality of life, or adverse effects. Twenty-six unique studies met the inclusion criteria. For patients with previously untreated mm and for candidates for transplantation, we found a statistically significant benefit in time to progression [hazard ratio (hr): 0.48, p < 0.001; and hr: 0.63, p = 0.006, respectively] and a better response with a bortezomib than with a non-bortezomib regimen (p < 0.001). Progression-free survival was longer with bortezomib and thalidomide than with thalidomide alone (p = 0.01). In non-candidates for transplantation, a significant benefit in overall survival was observed with a bortezomib regimen (hr compared with a non-bortezomib regimen: 0.61; p = 0.008), and in transplantation candidates receiving bortezomib, the response rate was improved after induction (p = 0.004) and after a first transplant (p = 0.016). In relapsed or refractory mm, overall survival (p = 0.03), time to progression (hr: 1.82; p = 0.000004), and progression-free survival (hr: 1.69; p = 0.000026) were significantly improved with bortezomib and pegylated liposomal doxorubicin (compared with bortezomib alone), and bortezomib monotherapy was better than dexamethasone alone (hr: 0.77; p = 0.027). Bortezomib combined with thalidomide and dexamethasone was better than either bortezomib monotherapy or thalidomide with dexamethasone (p < 0.001). In previously untreated or in relapsed or refractory mm patients, bortezomib-based therapy has improved disease control and, in some patients, overall survival.

Review of health-related quality of life data in multiple myeloma patients treated with novel agents

In multiple myeloma (MM), health-related quality of life (HRQoL) data is becoming increasingly important, owing to improved survival outcomes and the impact of treatment-related toxicity on HRQoL. Researchers are more frequently including HRQoL assessments in clinical trials, but analysis and reporting of this data has not been consistent. A systematic literature review assessed the effect of novel agents (thalidomide, bortezomib and lenalidomide) on HRQoL in MM patients, and evaluated the subsequent reporting of these HRQoL results. A relatively small body of literature addresses HRQoL data in MM patients treated with novel MM therapeutic agents: 9 manuscripts and 15 conference proceedings. The literature demonstrates the complementary value of HRQoL when assessing clinical response, progression, overall survival and toxicity. However, weaknesses and inconsistencies in analysis and presentation of HRQoL data were observed, often complicating interpretation of the impact of treatment on HRQoL in MM. Further evaluation of HRQoL in MM patients treated with novel agents is required in larger cohorts, and ideally in head-to-head comparative studies. Additionally, the development of standardised MM-specific best practice guidelines in HRQoL data collection and analysis is recommended. These would ensure that future data are more useful in guiding predictive models and clinical decisions.

Quality of life and supportive care in multiple myeloma

Multiple myeloma is the second most common haematological malignancy. Novel therapies have led to improvement in survival. Current myeloma management is matching the progress made in improved survival through disease control while optimising quality of life with effective supportive care. Supportive treatment is an essential part of the therapeutic management of myeloma patients because it is directed towards improving the patient’s quality of life and also can improve survival. The aim of this review is to highlight the relationship among life of quality, supportive care, and improvement in survival.

Conflict of interest:None declared.

Impact of the treatment-free interval on health-related quality of life in patients with multiple myeloma: a UK cross-sectional survey

BACKGROUND

While the impact of various treatments on myeloma patients' health-related quality of life (HRQL) has been reported, the impact of a treatment-free interval (TFI) is currently unclear. The aims of this study were to assess if (1) a TFI is associated with a better HRQL vs. other treatment phases and (2) the length of the TFI influences HRQL.

METHODS

A cross-sectional postal survey was conducted in the UK. The survey was sent to 605 multiple myeloma patients via the charity Myeloma UK and asked patients to rate their HRQL using the European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire Core 30 (QLQ-C30), EORTC QLQ-MY20 and the EQ-5D. The results were analysed using ordinary least squares regression.

RESULTS

Surveys of 402 (67 %) were returned; 370 (61 %) were considered eligible for analysis. Results demonstrated that being in a first TFI relative to other treatment phases and experiencing a longer TFI were significantly associated with better HRQL as assessed by various domains of the QLQ-C30, MY20 and EQ-5D.

CONCLUSION

Patients enjoy better HRQL when in their first TFI, and the length of the TFI also positively impacts on HRQL This information may be important for patients and their physicians making treatment decisions and has implications for treatment protocols incorporating extended therapy.

Proteasome inhibition and its therapeutic potential in multiple myeloma

Due to an unmet clinical need for treatment, the first in class proteasome inhibitor, bortezomib, moved from drug discovery to FDA approval in multiple myeloma in an unprecedented eight years. In the wake of this rapid approval arose a large number of questions about its mechanism of action and toxicity as well as its ultimate role in the treatment of this disease. In this article, we briefly review the preclinical and clinical development of the drug as the underpinning for a systematic review of the large number of clinical trials that are beginning to shed some light on the full therapeutic potential of bortezomib in myeloma. We conclude with our current understanding of the mechanism of action of this agent and a discussion of the novel proteasome inhibitors under development, as it will be progress in these areas that will ultimately determine the true potential of proteasome inhibition in myeloma.

Effects of induction with novel agents versus conventional chemotherapy on mobilization and autologous stem cell transplant outcomes in multiple myeloma

Multiple myeloma (MM) is the top indication for high-dose chemotherapy (HDC) with autologous stem cell transplantation (SCT), a strategy which improves progression-free survival and potentially overall survival (OS). Novel induction regimens incorporating the immunomodulatory (IMID) agents, such as thalidomide and lenalidomide and the proteosome inhibitor bortezomib improve response rates and survival for newly diagnosed patients. Recent data temper enthusiasm for these treatments by illustrating difficulty in some circumstances with mobilizing CD34(+) hematopoietic stem cells for subsequent HDC/SCT. We compare conventional induction regimens with novel agent-based induction strategies and the associated effects on stem cell mobilization and HDC/SCT outcome in 224 patients. Although patients exposed to novel agent inductions collected generally fewer CD34(+) cells than patients induced with chemotherapy, these differences did not translate into adverse consequences with subsequent HDC/SCT. We show that an improvement in OS after HDC/SCT may be related to induction therapy with novel agents as opposed to chemotherapy. Our data extrapolate on prior work and expand on ongoing controversies about optimal induction regimens for patients with MM planned for subsequent HDC/SCT and optimal sequencing of therapies.

Living with multiple myeloma: experiences of patients and their informal caregivers

GOALS OF WORK

The purpose of this study was to explore the experience of living with myeloma after completion of treatments in patients and their informal caregivers.

PATIENTS AND METHODS

Qualitative interviews were carried out with 20 patients living with myeloma and 16 of their informal caregivers (mostly spouses), asking them through semi-structured interviews to talk about the effects of myeloma on their lives, issues and concerns, their supportive care needs and how they were coping in everyday life.

MAIN RESULTS

Key findings indicate the significant impact myeloma has on patients' and caregivers' emotional, role, social and work-related areas of life. While patients seemed less engaged with their illness, their informal caregivers were providing practical and emotional support to patients almost exclusively, often by neglecting their own needs. This increased engagement with the informal caring often led to experiences of a heightened illness burden and difficulties with coping. Both patients and caregivers had significant fears and uncertainty about the future, with myeloma being described as a 'time bomb'. Both patients and caregivers were concealing stressful situations related to the illness from each other in an effort to protect them, although this resulted in isolation.

CONCLUSIONS

While health professionals' attention has been concentrated in helping patients to get through treatments, it is imperative that psychosocial rehabilitation is offered also to those who survive many years after diagnosis and are off treatments. Caregivers are particularly vulnerable to the high demands of caring for myeloma patients, and a more concerted action by health professionals should be directed to them.

The 26 S proteasome: from basic mechanisms to drug targeting

The regulated degradation of proteins within eukaryotes and bacterial cells is catalyzed primarily by large multimeric proteases in ATP-dependent manner. In eukaryotes, the 26 S proteasome is essential for the rapid destruction of key regulatory proteins, such as cell cycle regulators and transcription factors, whose fast and tuned elimination is necessary for the proper control of the fundamental cell processes they regulate. In addition, the 26 S proteasome is responsible for cell quality control by eliminating defective proteins from the cytosol and endoplasmic reticulum. These defective proteins can be misfolded proteins, nascent prematurely terminated polypeptides, or proteins that fail to assemble into complexes. These diverse activities and its central role in apoptosis have made the proteasome an important target for drug development, in particular to combat malignancies.