RESUMEN
INTRODUCTION: Waldenström's Macroglobulinemia (WM) is an indolent lymphoma with uniquely distinct and heterogenous clinical and genomic profiles. Clonal lymphoplasmacytic cells secrete monoclonal IgM. More than 90% of patients harbor a mutation in MYD88 gene, leading to the constitutive activation of downstream pathways, involving BTK-mediated signaling. The use of BTK inhibitors has changed the treatment landscape of WM and has paved the way for new approaches to therapy. AREAS COVERED: WM is an orphan disease and ibrutinib is the only FDA/EMA approved agent. Currently established agent combinations will be reviewed with a focus on emerging therapeutic options. These include second generation inhibitors, agents that target other molecules in the BCR signaling pathway, CXCR4 inhibitors, proteasome inhibitors and anti-CD38 antibodies. The current research goal is to establish a combination that can induce deep and durable responses with minimal associated toxicity. In addition, agents that can overcome ibrutinib resistance or act in a synergistic manner with BTKi are under investigation. EXPERT OPINION: The optimal therapeutic approach for WM patients is not currently established. The question of whether a combinatory (or synergistic) regimen to overcome resistance and allow for fixed- duration treatment will allow for deep/durable responses is being addressed in ongoing clinical trials.
Asunto(s)
Agammaglobulinemia Tirosina Quinasa/antagonistas & inhibidores , Inhibidores de Proteínas Quinasas/administración & dosificación , Macroglobulinemia de Waldenström/tratamiento farmacológico , Adenina/análogos & derivados , Adenina/farmacología , Agammaglobulinemia Tirosina Quinasa/metabolismo , Diseño de Fármacos , Resistencia a Medicamentos , Humanos , Mutación , Factor 88 de Diferenciación Mieloide/genética , Producción de Medicamentos sin Interés Comercial , Piperidinas/farmacología , Inhibidores de Proteínas Quinasas/farmacología , Enfermedades Raras , Macroglobulinemia de Waldenström/genética , Macroglobulinemia de Waldenström/fisiopatologíaAsunto(s)
Esclerosis Amiotrófica Lateral/diagnóstico , Neoplasias Encefálicas/diagnóstico por imagen , Neoplasias del Sistema Nervioso Periférico/diagnóstico por imagen , Neoplasias de la Médula Espinal/diagnóstico por imagen , Macroglobulinemia de Waldenström/diagnóstico , Anciano , Neoplasias Encefálicas/fisiopatología , Crioglobulinemia/diagnóstico , Crioglobulinemia/fisiopatología , Diagnóstico Diferencial , Electrodiagnóstico , Electromiografía , Fasciculación/fisiopatología , Humanos , Inmunoglobulina M/líquido cefalorraquídeo , Masculino , Debilidad Muscular/fisiopatología , Atrofia Muscular/fisiopatología , Recurrencia Local de Neoplasia/diagnóstico , Recurrencia Local de Neoplasia/fisiopatología , Conducción Nerviosa , Neoplasias del Sistema Nervioso Periférico/fisiopatología , Neoplasias de la Médula Espinal/fisiopatología , Macroglobulinemia de Waldenström/fisiopatologíaRESUMEN
INTRODUCTION: Bing-Neel syndrome is a lympho-plasmocytic infiltration of the central nervous system. The Bing-Neel syndrome is a rare entity, which often occurs during the evolution of a Waldenström's macroglobulinemia but can in some cases be the revealing mode of it. OBSERVATION: We report the case of a 56-year-old patient with tumoral form of Bing-Neel syndrome revealing Waldentrom's macroglobulinemia. CONCLUSION: This observation describes a rare entity whose diagnosis and therapeutic management is complex.
Asunto(s)
Enfermedades del Sistema Nervioso Central/diagnóstico , Macroglobulinemia de Waldenström/diagnóstico , Enfermedades del Sistema Nervioso Central/fisiopatología , Humanos , Masculino , Persona de Mediana Edad , Síndrome , Macroglobulinemia de Waldenström/fisiopatologíaRESUMEN
PURPOSE: To image retinal blood vessels in patients with Waldenström's macroglobulinemia using optical coherence tomography (OCT). METHODS: Retrospective case series examining fundus photographs and OCT scans of 16 eyes in eight patients with Waldenström's macroglobulinemia. Analyses included intravascular OCT reflectivity profiles and vessel diameters, and their relation to total immunoglobulin M (IgM) levels. RESULTS: In six out of eight patients, cross-sectional OCT scans of larger retinal vessels (diameter > 100 µm) showed normal intravascular reflectivity and retrovascular shadowing. In two patients with the highest total IgM > 60 g/l, altered intravascular reflectivity, distinct anterior and posterior vessel wall reflexes, and retrovascular hyposhadowing were seen. Normalization of the OCT reflectivity in these patients occurred after reduction of total IgM to < 17 g/l and was accompanied by decreasing venous tortuosity and disappearance of retinal haemorrhages and cotton wool spots. CONCLUSION: This study found that Waldenström's macroglobulinemia and total IgM > 60 g/l were associated with abnormal intravascular reflectivity and retrovascular shadowing on OCT. Awareness of these signs of hyperviscosity could potentially enable earlier detection of critical conditions in patients with Waldenström's macroglobulinemia and improve the assessment of severity and treatment effect.
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Vasos Retinianos/patología , Tomografía de Coherencia Óptica , Macroglobulinemia de Waldenström/fisiopatología , Anciano , Estudios Transversales , Femenino , Humanos , Inmunoglobulina M/sangre , Masculino , Persona de Mediana Edad , Vasos Retinianos/diagnóstico por imagen , Estudios Retrospectivos , Macroglobulinemia de Waldenström/sangre , Macroglobulinemia de Waldenström/diagnóstico por imagenAsunto(s)
Viscosidad Sanguínea/inmunología , Inmunoglobulina M/sangre , Intercambio Plasmático/métodos , Rituximab/administración & dosificación , Macroglobulinemia de Waldenström , Anciano de 80 o más Años , Examen de la Médula Ósea/métodos , Diagnóstico Diferencial , Femenino , Humanos , Inmunoelectroforesis/métodos , Factores Inmunológicos/administración & dosificación , Mieloma Múltiple/diagnóstico , Factor Reumatoide/sangre , Resultado del Tratamiento , Macroglobulinemia de Waldenström/sangre , Macroglobulinemia de Waldenström/diagnóstico , Macroglobulinemia de Waldenström/fisiopatología , Macroglobulinemia de Waldenström/terapiaAsunto(s)
Linfoma de Células B/diagnóstico , Linfoma de Células B/tratamiento farmacológico , Macroglobulinemia de Waldenström/diagnóstico , Macroglobulinemia de Waldenström/tratamiento farmacológico , Humanos , Inmunoglobulina M/metabolismo , Linfoma de Células B/fisiopatología , Pronóstico , Macroglobulinemia de Waldenström/genética , Macroglobulinemia de Waldenström/fisiopatologíaRESUMEN
Acquired C1-inhibitor (C1-INH) deficiency is a rare and potentially life-threatening disorder, which presents with recurrent attacks of non-pitting oedema to the face, airway, limbs or gastrointestinal tract. It is often associated with underlying B-cell lymphoproliferative disorders. We describe a case of a 73-year-old man with acquired C1-INH deficiency who presented with nephrotic syndrome due to glomerular IgM deposition, secondary to an underlying secretory lymphoplasmacytic lymphoma. Both the acquired C1-INH deficiency and the nephrotic syndrome resolved when the underlying B-cell lymphoma was treated with rituximab and bendamustine, suggesting the underlying lymphoproliferative malignancy was driving both disorders.
Asunto(s)
Angioedemas Hereditarios/diagnóstico , Antineoplásicos Alquilantes/uso terapéutico , Clorhidrato de Bendamustina/uso terapéutico , Síndrome Nefrótico/diagnóstico , Rituximab/uso terapéutico , Macroglobulinemia de Waldenström/diagnóstico , Anciano , Angioedemas Hereditarios/tratamiento farmacológico , Angioedemas Hereditarios/etiología , Angioedemas Hereditarios/fisiopatología , Humanos , Masculino , Síndrome Nefrótico/tratamiento farmacológico , Síndrome Nefrótico/etiología , Síndrome Nefrótico/fisiopatología , Calidad de Vida , Reinserción al Trabajo , Resultado del Tratamiento , Macroglobulinemia de Waldenström/complicaciones , Macroglobulinemia de Waldenström/tratamiento farmacológico , Macroglobulinemia de Waldenström/fisiopatologíaAsunto(s)
Neoplasias del Sistema Nervioso Central , Trasplante de Células Madre Hematopoyéticas , Macroglobulinemia de Waldenström , Anciano , Neoplasias del Sistema Nervioso Central/diagnóstico por imagen , Neoplasias del Sistema Nervioso Central/fisiopatología , Neoplasias del Sistema Nervioso Central/terapia , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Síndrome , Trasplante Autólogo , Macroglobulinemia de Waldenström/diagnóstico por imagen , Macroglobulinemia de Waldenström/fisiopatología , Macroglobulinemia de Waldenström/terapiaRESUMEN
A 71-year-old female patient presented with a 14-year history of slowly progressive distal limb numbness, paraesthesia and reduced vibration perception, ataxic gait and intentional tremor. Examination revealed with a length-dependent sensory neuropathy. Nerve conduction studies showed a chronic sensorimotor inflammatory demyelinating polyneuropathy. Intravenous immunoglobulin treatment (on two occasions) proved ineffective. Serum electrophoresis showed increased monoclonal IgM with kappa light chains. Anti-myelin-associated glycoprotein (MAG) levels were extremely elevated, >70 000 BTU. Bone marrow biopsy revealed 15%-20% small B cells and positive MYD88 mutation, indicative of Waldenstrom macroglobulinaemia. A diagnosis of Waldenstrom-associated anti-MAG paraprotein neuropathy with intentional (neurogenic) tremor was made. Repeat nerve conduction study showed a severe sensory demyelinating neuropathy with no axonal lesion. Treatment with rituximab was given for 1 month with minimal improvement. Repeat anti-MAG levels dropped to 53 670 BTU, with minimal clinical improvement.
Asunto(s)
Factores Inmunológicos/uso terapéutico , Glicoproteína Asociada a Mielina/metabolismo , Polirradiculoneuropatía Crónica Inflamatoria Desmielinizante/diagnóstico , Rituximab/uso terapéutico , Macroglobulinemia de Waldenström/diagnóstico , Anciano , Femenino , Ataxia de la Marcha/etiología , Humanos , Inmunoglobulina M/uso terapéutico , Paraproteínas/metabolismo , Polirradiculoneuropatía Crónica Inflamatoria Desmielinizante/tratamiento farmacológico , Polirradiculoneuropatía Crónica Inflamatoria Desmielinizante/fisiopatología , Resultado del Tratamiento , Temblor/etiología , Macroglobulinemia de Waldenström/tratamiento farmacológico , Macroglobulinemia de Waldenström/fisiopatologíaRESUMEN
INTRODUCTION: Ixazomib is a new, orally administered, reversible proteasome inhibitor which is under investigation for the treatment of refractory/relapsed multiple myeloma (MM), systemic light chain amyloidosis (AL) and Waldenström macroglobulinemia (WM). Areas covered: This article covers the mechanism of action, pharmacology and clinical trial results of ixazomib while under investigation for the treatment of various lymphoproliferative disorders. We examine the findings from several phase 3 clinical trials (i) the pivotal TOURMALINE-MM1 study investigating ixazomib versus placebo in combination with lenalidomide and dexamethasone; (ii) the TOURMALINE-MM3 study investigating ixazomib versus placebo as a maintenance therapy in newly diagnosed MM following induction therapy and autologous stem cell transplantation; (iii) the TOURMALINE-MM2 study investigating ixazomib versus placebo in combination with lenalidomide and dexamethasone in patients with newly diagnosed MM; and (iv) TOURMALINE-AL1 investigating ixazomib plus dexamethasone in patients with relapsed/refractory AL amyloidosis. Finally, we explore early phase clinical studies of this agent in Waldenström macroglobulinemia. Expert opinion: A key advantage of ixazomib is that it could allow an efficacious treatment approach to MM and other lymphoproliferative disorders through a convenient oral administration route. Ixazomib could soon be used in combination treatment regimens, but more work is necessary to define the place of this agent going forward.
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Antineoplásicos/administración & dosificación , Compuestos de Boro/administración & dosificación , Glicina/análogos & derivados , Trastornos Linfoproliferativos/tratamiento farmacológico , Administración Oral , Animales , Antineoplásicos/farmacología , Compuestos de Boro/farmacología , Dexametasona/administración & dosificación , Drogas en Investigación/administración & dosificación , Drogas en Investigación/farmacología , Glicina/administración & dosificación , Glicina/farmacología , Humanos , Amiloidosis de Cadenas Ligeras de las Inmunoglobulinas/tratamiento farmacológico , Amiloidosis de Cadenas Ligeras de las Inmunoglobulinas/fisiopatología , Trastornos Linfoproliferativos/fisiopatología , Mieloma Múltiple/tratamiento farmacológico , Mieloma Múltiple/fisiopatología , Inhibidores de Proteasas/administración & dosificación , Inhibidores de Proteasas/farmacología , Macroglobulinemia de Waldenström/tratamiento farmacológico , Macroglobulinemia de Waldenström/fisiopatologíaAsunto(s)
Enfermedades de la Retina/diagnóstico , Enfermedades de la Retina/etiología , Trastornos de la Visión , Macroglobulinemia de Waldenström/complicaciones , Ojo/fisiopatología , Angiografía con Fluoresceína , Fondo de Ojo , Humanos , Masculino , Persona de Mediana Edad , Enfermedades de la Retina/patología , Tomografía de Coherencia Óptica , Trastornos de la Visión/diagnóstico , Trastornos de la Visión/etiología , Trastornos de la Visión/fisiopatología , Macroglobulinemia de Waldenström/diagnóstico , Macroglobulinemia de Waldenström/fisiopatologíaRESUMEN
Light chain-associated Fanconi syndrome (LCFS) is a disorder of renal proximal tubule due to immunoglobulin light chains. Cases of LCFS are rare and mostly sporadically reported, and treatment of this entity is still controversial. This single-center retrospective study included 22 patients diagnosed with LCFS in Peking Union Medical College Hospital. Monoclonal gammopathy of undetermined significance was diagnosed in 13 patients, and overt multiple myeloma in six patients, with two smoldering myeloma and one Waldenstrom macroglobulinemia. Light chain was mostly kappa type (90.9%). Baseline median estimated glomerular filtration rate was 66 (13-126) ml/min/1.73 m2, with one patient presented as end-stage renal disease. After a median follow-up of 37 months, three patients died. Twelve patients were treated with chemotherapy, including 7 with bortezomib-based regimens. Renal function was significantly improved in the group of patients who received chemotherapy (p = 0.026). Compared with other chemotherapy regimens, patients with bortezomib-based treatment had a better hematological response (p = 0.027) as well as a better proximal tubule outcome (p = 0.015). Chemotherapy likely outweighs supportive treatment in patients with LCFS. Bortezomib-based regimen seems to be a safe first-line therapy for management of those patients.
Asunto(s)
Bortezomib/administración & dosificación , Síndrome de Fanconi , Tasa de Filtración Glomerular , Túbulos Renales/fisiopatología , Adulto , Anciano , Bortezomib/efectos adversos , Síndrome de Fanconi/tratamiento farmacológico , Síndrome de Fanconi/fisiopatología , Femenino , Estudios de Seguimiento , Humanos , Cadenas Ligeras de Inmunoglobulina , Masculino , Persona de Mediana Edad , Mieloma Múltiple/tratamiento farmacológico , Mieloma Múltiple/fisiopatología , Estudios Retrospectivos , Macroglobulinemia de Waldenström/tratamiento farmacológico , Macroglobulinemia de Waldenström/fisiopatologíaRESUMEN
INTRODUCTION: Waldenström's macroglobulinemia (WM) is a B-cell lymphoproliferative disease with serum IgM monoclonal component and bone marrow infiltration by lymphoplasmacytic lymphoma. Traditional therapy was based on that regimens used for closely related entities, such as chronic lymphocytic leukemia or multiple myeloma. This resulted in a lack of drugs specifically approved for WM, until the discovery of the Bruton Tyrosine Kinase (BTK) inhibitors. AREAS COVERED: Two main therapeutic attitudes are possible: (1) conventional therapies based on combinations with alkylating agents or proteasome inhibitors with steroids and anti-CD20 monoclonal antibodies or (2) new approaches with BTK inhibitors, usually alone. Other possibilities such as BCL2 inhibitors, PI3K/AKT inhibitors, and others are currently under evaluation, but we will focus the review on the most consolidated approaches that are available for patients with WM at different stages of the disease. PubMed, Web of Science, and clinicaltrials.gov were queried for the keywords 'Waldenstrom macroglobulinemia' and the different drugs here evaluated through 1 February 2018. EXPERT OPINION: Although WM has no many specific drugs, there are many possible therapies, including Ibrutinib, the first formally approved drug for this disorder.
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Inhibidores de Proteínas Quinasas/uso terapéutico , Proteínas Tirosina Quinasas/antagonistas & inhibidores , Macroglobulinemia de Waldenström/tratamiento farmacológico , Agammaglobulinemia Tirosina Quinasa , Animales , Aprobación de Drogas , Diseño de Fármacos , Humanos , Inhibidores de Proteínas Quinasas/efectos adversos , Inhibidores de Proteínas Quinasas/farmacología , Macroglobulinemia de Waldenström/fisiopatologíaAsunto(s)
Marcha/fisiología , Trastornos del Movimiento/fisiopatología , Médula Espinal/fisiopatología , Macroglobulinemia de Waldenström/líquido cefalorraquídeo , Anciano , Encefalopatías/líquido cefalorraquídeo , Encefalopatías/diagnóstico , Femenino , Humanos , Trastornos del Movimiento/líquido cefalorraquídeo , Trastornos del Movimiento/diagnóstico , Médula Espinal/diagnóstico por imagen , Macroglobulinemia de Waldenström/diagnóstico , Macroglobulinemia de Waldenström/fisiopatologíaAsunto(s)
Hemorragia Retiniana/etiología , Macroglobulinemia de Waldenström/diagnóstico , Viscosidad Sanguínea/fisiología , Humanos , Masculino , Persona de Mediana Edad , Hemorragia Retiniana/diagnóstico por imagen , Vena Retiniana/diagnóstico por imagen , Síndrome , Macroglobulinemia de Waldenström/fisiopatologíaRESUMEN
Waldenström macroglobulinemia (WM) is a low-grade B-cell clonal disorder characterized by lymphoplasmacytic bone marrow involvement associated with monoclonal immunoglobulin M. Although WM remains to be an incurable disease with a heterogeneous clinical course, the recent discovery of mutations in the MYD88 and CXCR4 genes further enhanced our understanding of its pathogenesis. Development of new therapies including monoclonal antibodies, proteasome inhibitors, and Bruton tyrosine kinase inhibitors have made the management of WM increasingly complex. Treatment should be tailored to the individual patient while considering many clinical factors. The clinical outcomes are expected to continue to improve, given the emergence of novel therapeutics and better understanding of the underlying pathogenesis.
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Antineoplásicos/uso terapéutico , Macroglobulinemia de Waldenström/tratamiento farmacológico , Macroglobulinemia de Waldenström/fisiopatología , HumanosRESUMEN
Waldenström's macroglobulinemia is a rare, low-grade non-Hodgkin lymphoma of B cell origin, most common in elderly male patients with a median age of 64 years at diagnosis. It accounts for approximately 2% of hematologic malignancies. The disease is incurable now with a median overall survival of 6.2 years. In the past decade growing evidence suggests the role of the complex signaling pathways and microenvironment as a potential target of the therapy in the lymphoproliferative disorders as well as Waldenström's macroglobulinemia. In this review we try to highlight the importance of these novel targets and their possible role in the therapeutic strategies. We further summarize our knowledge about the pathophysiology, diagnostics and therapeutics standards of the disease.
Asunto(s)
Terapia Molecular Dirigida , Macroglobulinemia de Waldenström/metabolismo , Macroglobulinemia de Waldenström/terapia , Humanos , Macroglobulinemia de Waldenström/diagnóstico , Macroglobulinemia de Waldenström/fisiopatologíaRESUMEN
INTRODUCTION: Waldenström's Macroglobulinemia (WM) is a rare, indolent, incurable, low-grade B-cell lymphoplasmacytic neoplasm. This review article provides a modern clinical perspective of the individualized management of patients with symptomatic WM, in the context of the updated treatment guidelines and the currently available trial data. Areas covered: Rituximab-based regimens (such as the dexamethasone, rituximab and cyclophosphamide combination, DRC) are the most widely used in the management of both newly diagnosed and relapsed/refractory patients with WM. Recently, the Bruton's tyrosine kinase inhibitor ibrutinib has been licensed for use in WM with exciting results. Several investigational single agent and combination regimens are being evaluated for response, efficacy and tolerability in phase II clinical trials, including new generation monoclonal antibodies (ofatumumab), immunomodulatory agents (thalidomide and lenalidomide), proteasome inhibitors (bortezomib and carfilzomib), Bruton's tyrosine kinase inhibitors (ibrutinib and acalabrutinib), phosphoinositide 3-kinase/protein kinase B (Akt)/mammalian target of rapamycin pathway inhibitors (everolimus and perifosene), and histone deacetylase inhibitors (panobinostat) both in the setting of newly diagnosed and relapsed/refractory disease. Expert opinion: WM therapeutic approach should be individualized for each patient in accordance to the intensity of the disease characteristics, age, comorbidities, efficacy, tolerability and safety profile of each drug.
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Diseño de Fármacos , Drogas en Investigación/uso terapéutico , Macroglobulinemia de Waldenström/tratamiento farmacológico , Drogas en Investigación/efectos adversos , Drogas en Investigación/farmacología , Humanos , Guías de Práctica Clínica como Asunto , Medicina de Precisión , Macroglobulinemia de Waldenström/fisiopatologíaAsunto(s)
Antineoplásicos/administración & dosificación , Glomeruloesclerosis Focal y Segmentaria , Inmunoglobulina M/análisis , Riñón , Macroglobulinemia de Waldenström , Diagnóstico Diferencial , Glomeruloesclerosis Focal y Segmentaria/diagnóstico , Glomeruloesclerosis Focal y Segmentaria/etiología , Humanos , Biopsia Guiada por Imagen/métodos , Riñón/diagnóstico por imagen , Riñón/patología , Masculino , Persona de Mediana Edad , Síndrome Nefrótico/sangre , Síndrome Nefrótico/diagnóstico , Síndrome Nefrótico/etiología , Tomografía de Emisión de Positrones/métodos , Tomografía Computarizada por Rayos X/métodos , Ultrasonografía/métodos , Macroglobulinemia de Waldenström/complicaciones , Macroglobulinemia de Waldenström/diagnóstico , Macroglobulinemia de Waldenström/fisiopatologíaRESUMEN
The incidence of pleuropulmonary manifestations in Waldenström's macroglobulinemia is low in haematological as well as pneumological international literature. The progressive decrease concerning these manifestations is due essentially to scant interdisciplinary attention for new issues correlated with this specific involvement, that is poorly understood and rarely object of dedicated publications.