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1.
Acta Haematol ; 2023 Nov 10.
Artículo en Inglés | MEDLINE | ID: mdl-37952510

RESUMEN

Introduction Hairy cell leukemia (HCL) is an indolent B-cell lymphoma characterized by a specific genetic mutation, BRAF V600E, which affects the specific morphology and oncogenesis. For HCL, few reports regarding secondary central nervous system involvement (SCNSI) are available. Herein, we present the case of an 80-year-old woman who had a relapse of HCL with SCNSI. Case presentation The diagnosis of HCL was made in June 2015 after identifying BRAF V600E proteins by immunohistochemical analysis, and the disease was then controlled for 6 years by employing chemoimmunotherapy. In February 2021, the patient was admitted with neurological symptoms such as dizziness. Magnetic resonance imaging of the brain showed abnormal enhancement in the cerebrum, and cerebrospinal fluid analysis revealed neoplastic cells without transformation into large cells. Thus, the patient was diagnosed as having SCNSI in HCL. Conclusion We report a case of a rare clinical presentation of SCNSI in HCL with literature review.

2.
Chemotherapy ; 67(2): 96-101, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-34839292

RESUMEN

BACKGROUND: Some chemotherapeutic agents cause carnitine deficiency, which causes general fatigue. However, there is no study on carnitine deficiency in patients with chronic myeloid leukemia (CML) during tyrosine kinase inhibitor (TKI) therapy. OBJECTIVE: In this study, we investigated carnitine concentrations in patients with CML receiving TKI therapy. METHOD: This study included patients with well-controlled CML. Total carnitine and free carnitine concentrations were evaluated using the enzyme cycling method. The brief fatigue inventory (BFI) and cancer fatigue scale (CFS) were used to assess general fatigue developed during TKI therapy. RESULTS: Fifty-five patients on TKI therapy were included. Of these, 12 (21.8%) patients had low free carnitine concentrations. Free carnitine concentrations were higher in men than in women. Younger age was closely associated with lower free carnitine concentrations. TKI type, TKI dose, treatment response, or therapy duration were not associated with free carnitine concentrations. None of the scores (the global fatigue score with the BFI and CFS score) correlated with carnitine concentrations. Concentrations of free carnitine in patients in the treatment-free remission group were slightly higher than those in the TKI group, with only 9.1% having a low concentration of free carnitine. CONCLUSION: Carnitine deficiency is probably not a major cause of general fatigue but may occur in patients with CML receiving TKI therapy.


Asunto(s)
Leucemia Mielógena Crónica BCR-ABL Positiva , Femenino , Humanos , Masculino , Cardiomiopatías , Carnitina/deficiencia , Fatiga/etiología , Hiperamonemia , Leucemia Mielógena Crónica BCR-ABL Positiva/tratamiento farmacológico , Enfermedades Musculares , Inhibidores de Proteínas Quinasas/efectos adversos
3.
Ann Hematol ; 99(12): 2787-2800, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32879992

RESUMEN

Significant advancements have been achieved with regard to the outcomes of acute promyelocytic leukemia (APL) patients through the introduction of all-trans retinoic acid; however, early hemorrhagic death and differentiation syndrome remain the major causes of remission induction failure in patients with APL. To investigate early death, serious hemorrhage, and differentiation syndrome during remission induction therapy in terms of incidence, risk factors, influence on outcomes, and prophylactic effects of several new anticoagulants, the results of 344 patients enrolled in the Acute Promyelocytic Leukemia 204 study conducted by the Japan Adult Leukemia Study Group were analyzed. Early death was observed in 16 patients (4.7%), of whom 14 had serious hemorrhage and 2 had differentiation syndrome. Serious hemorrhage and differentiation syndrome of grade 2 or higher were observed in 21 and 54 patients, respectively. Patients who achieved complete remission had a 7-year disease-free survival of 84.8% if they did not experience serious hemorrhage and 40.0% if they experienced serious hemorrhage during remission induction therapy (P = 0.001). Risk factor analyses showed that higher white blood cell count was associated with early death, higher white blood cell count and lower platelet count with serious hemorrhage, and leukocytosis during induction therapy and higher body surface area with differentiation syndrome. In conclusion, these results indicate that patients with such high-risk features may benefit from more intensive supportive care. The hemorrhagic risk was not relieved by the introduction of new anticoagulants. Further studies are required to establish the predictive impact of body surface area on differentiation syndrome. This trial is registered with UMIN-CTR as C000000154 on September 13, 2005.


Asunto(s)
Diferenciación Celular/fisiología , Hemorragia/diagnóstico , Hemorragia/mortalidad , Leucemia Promielocítica Aguda/diagnóstico , Leucemia Promielocítica Aguda/mortalidad , Índice de Severidad de la Enfermedad , Adolescente , Adulto , Anciano , Anticoagulantes/farmacología , Anticoagulantes/uso terapéutico , Diferenciación Celular/efectos de los fármacos , Femenino , Hemorragia/tratamiento farmacológico , Humanos , Japón , Leucemia Promielocítica Aguda/tratamiento farmacológico , Masculino , Persona de Mediana Edad , Mortalidad/tendencias , Valor Predictivo de las Pruebas , Estudios Prospectivos , Inducción de Remisión/métodos , Adulto Joven
4.
Ther Drug Monit ; 42(1): 133-138, 2020 02.
Artículo en Inglés | MEDLINE | ID: mdl-31323015

RESUMEN

BACKGROUND: Arbekacin (ABK) is used to treat infections caused by methicillin-resistant Staphylococcus aureus and is used widely for the treatment of febrile neutropenia (FN). As ABK has a narrow therapeutic concentration window, the dosage must be adjusted via therapeutic drug monitoring. However, the influence of the physiology of patients with FN on the pharmacokinetic (PK) parameters of ABK remains unclear. Therefore, we examined this influence on ABK PK parameters. METHOD: We performed a retrospective cohort study using data from patients with a hematologic malignancy who were ≥18 years and had been administered ABK. We excluded patients who did not receive therapeutic drug monitoring and had an estimated glomerular filtration rate (eGFR) of <30 mL/min, because clinically sufficient data would not be available. RESULT: Of the 99 enrolled patients, 25 did not have FN and 74 had FN. Arbekacin clearance (CLabk) was shown to correlate with eGFR in patients with FN (r = 0.32, P = 0.0062) and without FN (r = 0.50, P = 0.01). CLabk was higher in patients with FN than in those without FN. In addition, in the eGFR of <100 mL/min group (normal renal function), CLabk and CLabk/eGFR were also higher in patients with FN than in those without FN. CONCLUSIONS: CLabk was increased in patients with FN and normal renal function; therefore, we propose an increased ABK dose for patients with FN and normal renal function.


Asunto(s)
Antiinfecciosos/farmacocinética , Dibekacina/análogos & derivados , Neutropenia Febril/metabolismo , Adulto , Anciano , Antiinfecciosos/sangre , Estudios de Cohortes , Dibekacina/sangre , Dibekacina/farmacocinética , Monitoreo de Drogas , Neutropenia Febril/sangre , Femenino , Tasa de Filtración Glomerular , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos
5.
Rinsho Ketsueki ; 61(3): 245-250, 2020.
Artículo en Japonés | MEDLINE | ID: mdl-32224585

RESUMEN

Nodal marginal zone lymphoma (NMZL) is a form of nodal B-cell lymphoma exhibiting proliferation of abnormal lymphocytes at the circumference of the mantle zone in the lymph nodes. Although the outcome of patients with this disease is often favorable, we recently encountered a patient with a CD5-positive NMZL who was resistant to chemotherapy. A 67-year-old woman complaining of systemic lymph node swelling was referred to our hospital. After biopsy of the neck lymph node, she was diagnosed with CD5-positive NMZL. Disease progression was revealed after 16 months, and she was initially treated with chemotherapy consisting of rituximab, cyclophosphamide, vincristine, and prednisolone (R-CVP). However, this therapy was ineffective. Subsequent therapy with rituximab and bendamustine also failed to induce remission. A rebiopsy revealed that the NMZL had transformed into a diffuse large B-cell lymphoma. This patient died after 2 years from the initial diagnosis due to lymphoma progression. Cases of CD5-positive NMZL are rare; thus, it is difficult to study the clinical implications of CD5 expression in this disease. Here we describe the current understanding of CD5 expression in NMZL.


Asunto(s)
Linfoma de Células B de la Zona Marginal , Linfoma de Células B Grandes Difuso , Anciano , Clorhidrato de Bendamustina , Femenino , Humanos , Ganglios Linfáticos , Rituximab
6.
Pathol Int ; 68(1): 47-52, 2018 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-29193597

RESUMEN

We report the case of a 53-year-old male with a history of acute myelogenous leukemia, who suffered the rupturing of a right-sided pulmonary artery pseudoaneurysm combined with pneumonia. He underwent a right-sided lower lobectomy. The resected lung tissue demonstrated a mycotic pseudoaneurysm of a pulmonary artery branch together with a filamentous fungal infection. Pseudoaneurysms are caused by the breaching of all layers of a blood vessel wall. The extravasated blood is trapped by the surrounding extravascular tissue or clots. Cladosporium was detected during a polymerase chain reaction-based analysis followed by DNA sequencing of formalin-fixed paraffin-embedded lung tissue samples. Although previous cases of pulmonary artery pseudoaneurysms caused by fungal infections, e.g., Candida or Aspergillus sp., have been reported, to the best of our knowledge this is the first case to involve cladosporiosis.


Asunto(s)
Aneurisma Falso/microbiología , Micosis/complicaciones , Arteria Pulmonar/patología , Antineoplásicos/uso terapéutico , Cladosporium , Humanos , Huésped Inmunocomprometido , Leucemia Mieloide Aguda/tratamiento farmacológico , Masculino , Persona de Mediana Edad , Micosis/inmunología
7.
J Infect Chemother ; 24(7): 544-548, 2018 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-29627326

RESUMEN

A central venous catheter (CVC) is a catheter placed into a large vein, and is used for chemotherapy administration. However, there is little confirmatory data on which antiseptic-such as chlorhexidine or povidone-iodine (PI) -is more protective against CVC-related infectious complications in patients receiving intensive chemotherapy. We aimed to compare the effectiveness of 1% chlorhexidine gluconate in 70% alcohol (CH) vs. PI for skin disinfection before CVC insertion in patients receiving intensive chemotherapy. Methods We used either CH or 10% PI as skin antiseptics before CVC insertion, and assessed which agent was more protective against CVC-related infection. The participants were 112 patients with haematologic malignancies who underwent chemotherapy; a total of 292 CVCs were inserted over this period. Blood cultures were obtained when febrile neutropenia occurred. The CVC was removed and the catheter-tip qualitatively cultured when catheter-related infection was suspected. The cumulative incidence of febrile neutropenia, microbial growth from blood or catheter-tip culture, and catheter-related blood stream infection (CRBSI) was evaluated retrospectively. A univariate Cox proportional hazards model showed that CH significantly alleviated infectious complications. Notably, no case of CRBSI occurred in the CH group. Multivariate analysis, adjusted for prolonged neutropenia (>15 days) and older age (>52 years), also showed significant reduction in the cumulative incidence of microbial growth from catheter-tips in the CH group (hazard ratio = 0.146, 95% confidence interval: 0.023-0.502, p = 0.0008). Disinfection using CH, compared with PI, can potentially decrease catheter-related infection without causing adverse skin reactions in patients with haematologic malignancies.


Asunto(s)
Antiinfecciosos Locales/uso terapéutico , Infecciones Relacionadas con Catéteres/tratamiento farmacológico , Infecciones Relacionadas con Catéteres/prevención & control , Catéteres Venosos Centrales/microbiología , Clorhexidina/análogos & derivados , Neoplasias Hematológicas/tratamiento farmacológico , Adolescente , Adulto , Anciano , Cateterismo Venoso Central , Catéteres Venosos Centrales/efectos adversos , Neutropenia Febril Inducida por Quimioterapia/sangre , Neutropenia Febril Inducida por Quimioterapia/microbiología , Clorhexidina/uso terapéutico , Desinfección/métodos , Contaminación de Equipos , Etanol , Femenino , Humanos , Masculino , Persona de Mediana Edad , Povidona Yodada/uso terapéutico , Estudios Retrospectivos , Piel/microbiología
8.
Cancer Cell Int ; 15: 30, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-25805962

RESUMEN

BACKGROUND: Granulocyte colony-stimulating factor (G-CSF) promotes proliferation, survival, and differentiation of myeloid-linage leukemic cells, as well as normal hematopoietic cells. Terminal granulocytic differentiation can be induced in acute promyelocytic (APL) cell line HT93A by G-CSF and all-trans retinoic acid (ATRA). Because the detailed mechanism has never been shown, we investigated the signal transduction pathway in granulocytic differentiation by G-CSF, alone or in combination with ATRA. METHODS: HT93A cell viability and growth were investigated by trypan blue exclusion assay. Cell differentiation was assessed by CD11b and CD34 expressions. Intracellular protein expressions were also evaluated by flow cytometry after fixation and permeabilization. RESULTS: ATRA (100 nM) induced granulocytic differentiation (upregulation of CD11b and downregulation of CD34) and the effect was potentiated by addition of G-CSF, while G-CSF alone had no effect on HT93A cells. The addition of G-CSF to ATRA had little or no effect on NB4 and THP-1 cells in comparison to ATRA alone. G-CSF receptor expression was reduced by ATRA treatment in a time-dependent manner. After 5 days' incubation with ATRA, the expression levels of signal transducer and activator of transcription (STAT) 3, and phosphorylated STAT3 and STAT5, were significantly reduced. STAT5 was strongly activated by G-CSF stimulation in ATRA-pretreated cells in comparison to untreated cells. In contrast, STAT3 showed no response to G-CSF. Janus kinase (JAK) inhibitor ruxolitinib (320 nM) had little or no effect on ATRA-induced differentiation, but eliminated the enhancing effect of G-CSF, as evidenced by the levels of CD11b and CD34 expression. These results suggest G-CSF activates STAT5 through the JAK pathway in combination with ATRA, resulting in myeloid differentiation in HT93A cells. CONCLUSIONS: In conclusion, activation of the JAK-STAT pathway is likely essential for inducting differentiation in the APL cell line HT93A; thus, monitoring its expression and activation is important for predicting clinical efficacy and understanding the mechanisms of cytokine-dependent myelopoiesis, proliferation, and differentiation of acute myeloid leukemia.

9.
Anaerobe ; 32: 43-48, 2015 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-25481562

RESUMEN

A novel Gram-stain positive, non-motile, non-sporeforming coccus-shaped, obligately anaerobic bacterium was isolated from a fecal sample of an individual residing in a traditional Peruvian community. The organism was characterized using biochemical, chemotaxonomic and phylogenetic methods. Comparative 16S rRNA gene sequence analyses and phenotypic characteristics demonstrated that the organism was biochemically and phenotypically related, but distinct, from a group of organisms referred to as the Gram-stain positive anaerobic cocci (GPAC). The major cellular fatty acids of the novel isolate were determined to be C16:0 (18.3%), C18:1ω9c (39.8%), C18:2ω6,9c/C18:0 ANTE (13.2%). Fermentation end products from PYG are acetate and formate. Cell-wall peptidoglycan was found to be A4α (L-Lys-L-Ala-L-Glu) and the G + C content was determined to be 38.4 mol%. Based on the phenotypic, chemotaxonomic, and phylogenetic results, Ezakiella peruensis gen. nov., sp. nov., is now proposed. The type strain is M6.X2(T) (DSM 27367(T) = NBRC 109957 (T) = CCUG 64571(T)).


Asunto(s)
Portador Sano , Heces/microbiología , Firmicutes/aislamiento & purificación , Vigilancia de la Población , Técnicas de Tipificación Bacteriana , ADN Bacteriano , Firmicutes/química , Firmicutes/clasificación , Firmicutes/genética , Humanos , Datos de Secuencia Molecular , Perú , Fenotipo , Filogenia , ARN Ribosómico 16S/genética
10.
Int J Syst Evol Microbiol ; 63(Pt 6): 1982-1986, 2013 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-23041636

RESUMEN

The taxonomic properties of strain DC2a-G7(T), a Gram-negative, ovoid to rod-shaped, gellan gum-lysing bacterium, were examined. The 16S rRNA gene sequence similarity showed that DC2a-G7(T) is a member of the phylum Verrucomicrobia and the closest type strain of a species with a validly published name is Verrucomicrobium spinosum DSM 4136(T), with a sequence similarity of 91.2%. In addition to this similarity value lower than 95%, the absence of prostheca, the orangey-red colony colour and the compositions of the major menaquinones and polar lipids also supported the differentiation of this bacterium from the genus Verrucomicrobium. Here, we propose the name Roseimicrobium gellanilyticum gen. nov., sp. nov. for the isolate. The type strain of Roseimicrobium gellanilyticum is DC2a-G7(T) (=NBRC 108606(T)=DSM 25532(T)).


Asunto(s)
Filogenia , Verrucomicrobia/clasificación , Técnicas de Tipificación Bacteriana , Composición de Base , ADN Bacteriano/genética , Ácidos Grasos/análisis , Datos de Secuencia Molecular , ARN Ribosómico 16S/genética , Análisis de Secuencia de ADN , Verrucomicrobia/genética , Vitamina K 2/análisis
11.
Chemotherapy ; 59(2): 152-8, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-24080768

RESUMEN

BACKGROUND: Elderly acute myeloid leukemia (AML) patients and patients with higher-risk myelodysplastic syndromes (MDS) have a much poorer prognosis than younger patients despite intensive chemotherapy. METHODS: Ten patients with higher-risk MDS and 12 patients with AML over 65 years of age were enrolled into this study and received oral induction therapy with cytarabine ocfosfate and etoposide. RESULTS: The therapy response rates were 60% in the MDS group and 41.7% in the AML group. The difference in overall survival among MDS and AML patients was not statistically significant. The difference in the median survival times of the responsive and nonresponsive groups, which included MDS and AML patients, was statistically significant (790 and 174 days, respectively). CONCLUSIONS: Based on a comparison of the data of this therapy in elderly higher-risk MDS patients versus elderly AML patients, we conclude that this therapy is well tolerated and can be cost-effective and useful for higher-risk MDS in elderly patients.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Arabinonucleotidos/administración & dosificación , Citidina Monofosfato/análogos & derivados , Etopósido/administración & dosificación , Leucemia Mieloide Aguda/tratamiento farmacológico , Síndromes Mielodisplásicos/tratamiento farmacológico , Administración Oral , Anciano , Anciano de 80 o más Años , Citidina Monofosfato/administración & dosificación , Supervivencia sin Enfermedad , Femenino , Humanos , Estimación de Kaplan-Meier , Leucemia Mieloide Aguda/mortalidad , Masculino , Síndromes Mielodisplásicos/mortalidad , Resultado del Tratamiento
12.
EJHaem ; 4(3): 833-836, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37601852

RESUMEN

Extramedullary hematopoietic effusion (EHE) is one of the extremely rare phenomena associated with extramedullary hematopoiesis, which is caused by serous effusions, including pleural effusion, and may be related to hematologic disorders and neoplasms. Herein, we present the case of an 81-year-old man with EHE accompanying Waldenström's macroglobulinemia (WM). The patient complained of anemia and dyspnea. The chest X-ray and computed tomography showed a massive left pleural effusion, and the aspirates revealed infiltration of the immature myeloid cells and megakaryocytes, in addition to the lymphoma cells. To our knowledge, this is the first report of EHE in WM.

13.
Arch Microbiol ; 194(3): 187-95, 2012 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-21858648

RESUMEN

The 16S rRNA gene sequences of 12 strains of Thiobacillus thioparus held by different culture collections have been compared. A definitive sequence for the reference type strain (Starkey; ATCC 8158(T)) was obtained. The sequences for four examples of the Starkey type strain were essentially identical, confirming their sustained identity after passage through different laboratories. One strain (NCIMB 8454) was reassigned as a strain of Halothiobacillus neapolitanus, and a second (NCIMB 8349) was a species of Thermithiobacillus. These two strains have been renamed in their catalog by the National Collection of Industrial and Marine Bacteria. The 16S rRNA gene sequence of the type strain of Halothiobacillus neapolitanus (NCIMB 8539(T)) was determined and used to confirm the identity of other culture collection strains of this species. The reference sequences for the type strains of Thiobacillus thioparus and Halothiobacillus neapolitanus have been added to the online List of Prokaryotic Names with Standing in Nomenclature. Comparison of the 16S rRNA gene sequences available for strains of Thiobacillus denitrificans indicated that the sequence for the type strain (NCIMB 9548(T)) should always be used as the reference sequence for new and existing isolates.


Asunto(s)
Halothiobacillus/clasificación , Filogenia , ARN Ribosómico 16S/genética , Thiobacillus/clasificación , Genes de ARNr , Halothiobacillus/genética , Datos de Secuencia Molecular , ARN Bacteriano/genética , Análisis de Secuencia de ARN , Thiobacillus/genética
14.
J Int Med Res ; 50(12): 3000605221144149, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36518090

RESUMEN

Other iatrogenic immunodeficiency lymphoproliferative disorders (oii-LPD) are defined as lymphoid proliferations or lymphomas that occur in patients taking immunosuppressive agents (ISA) for autoimmune disorders (AID). Although methotrexate and tumor necrosis factor-alpha inhibitors cause oii-LPD, the association between corticosteroids and lymphomagenesis remains unknown. Herein, we present the case of a 51-year-old woman with oii-LPD caused by corticosteroid use for autoimmune hemolytic anemia (AIHA). The diagnosis of AIHA was made in May 2016, and AIHA had been well-controlled for 5 years with oral prednisolone (PSL). During a regular follow-up visit in March 2022, an abnormal increase in atypical lymphoid cells in the peripheral blood was found. The bone marrow biopsy specimens showed local aggregations of large cells that were identified as lymphoplasmacytic cells and plasma cells, and that were positive for cluster of differentiation (CD)19 and CD20, with apparent nucleoli among the diffuse infiltration of atypical small lymphocytes. The large cells were partially positive for the Epstein-Barr encoding region in situ hybridization and latent membrane protein 1, which confirmed Epstein-Barr virus (EBV)-affected lymphomagenesis. To our knowledge, this is the first report of an oii-LPD case shown to be induced by corticosteroid use for AID.


Asunto(s)
Enfermedades Autoinmunes , Infecciones por Virus de Epstein-Barr , Síndromes de Inmunodeficiencia , Trastornos Linfoproliferativos , Femenino , Humanos , Persona de Mediana Edad , Herpesvirus Humano 4 , Infecciones por Virus de Epstein-Barr/complicaciones , Trastornos Linfoproliferativos/inducido químicamente , Trastornos Linfoproliferativos/diagnóstico , Trastornos Linfoproliferativos/patología , Enfermedades Autoinmunes/complicaciones , Corticoesteroides/efectos adversos , Enfermedad Iatrogénica
15.
Expert Rev Anticancer Ther ; 22(6): 583-595, 2022 06.
Artículo en Inglés | MEDLINE | ID: mdl-35472312

RESUMEN

INTRODUCTION: The standard of care for diffuse large B-cell lymphoma (DLBCL) is rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP). However, its ideal dose intensity varies among cases. AREAS COVERED: This review provides the latest insights on the dose intensity of R-CHOP for DLBCL patients. Specifically, we discussed the optimal dose intensity for elderly patients, the optimal number of treatment cycles for limited or advanced-stage diseases, and the role of dose-intensified therapies or adding targeted inhibitors. EXPERT OPINION: Performing a comprehensive or simplified geriatric assessment can distinguish elderly DLBCL patients who will likely benefit from curative R-CHOP. Very elderly or medically unfit patients may need dose reduction in R-CHOP; the Age, Comorbidities, and Albumin index may aid decision-making. Four cycles of R-CHOP followed by two rituximab cycles comprise a new standard for low-risk, limited-stage DLBCL patients. Compared to eight cycles, six cycles of R-CHOP have similar efficacy and fewer toxicities for advanced-stage DLBCL. Dose-intensified therapy is not recommended in most DLBCL cases but may be considered for patients with double (or triple)-hit lymphoma. Applying targeted inhibitors and not merely escalating R-CHOP dose intensity through molecular subtyping will improve the treatment outcome for DLBCL.


Diffuse large B-cell lymphoma (DLBCL) is one of the most common blood cancers. Patients with DLBCL are usually treated with a standard (immuno-) chemotherapy called R-CHOP, which stands for rituximab, cyclophosphamide, hydroxydaunorubicin (doxorubicin), Oncovin, and prednisone. Of these, cyclophosphamide and doxorubicin are particularly toxic but effective. Therefore, the dosages of these drugs are adjusted according to the patient's body size. However, the ideal amounts of these drugs (dose intensity) can vary from case to case. For instance, the regular dose intensity of R-CHOP is too toxic for some people, such as very older patients. Furthermore, ideal total amounts of these drugs, that is, ideal cycle numbers of R-CHOP, are also different between patients with limited disease and advanced disease. Therefore, oncology/hematology researchers have been seeking the optimal dose intensity of R-CHOP in each patient with DLBCL for years. The goal of this review is to provide the latest insights on the ideal dose intensity of R-CHOP in DLBCL treatment. In this article, we discuss: how R-CHOP was established as the standard of care for DLBCL, how to identify candidates for standard R-CHOP among older patients, how to adjust the dose intensity of R-CHOP for patients who are not candidates for standard R-CHOP, optimal cycle number of R-CHOP for limited-disease DLBCL, optimal cycle number of R-CHOP for advanced DLBCL, how to treat patients with a large mass, and the role of more intensive therapies other than R-CHOP in DLBCL treatment. Finally, we demonstrate how experts determined the dose intensity of R-CHOP for some example cases with DLBCL.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica , Linfoma de Células B Grandes Difuso , Anciano , Anticuerpos Monoclonales de Origen Murino/efectos adversos , Ciclofosfamida/efectos adversos , Doxorrubicina/efectos adversos , Humanos , Linfoma de Células B Grandes Difuso/tratamiento farmacológico , Linfoma de Células B Grandes Difuso/etiología , Linfoma de Células B Grandes Difuso/patología , Prednisona , Rituximab/efectos adversos , Resultado del Tratamiento , Vincristina/efectos adversos
16.
EJHaem ; 3(2): 467-470, 2022 May.
Artículo en Inglés | MEDLINE | ID: mdl-35846032

RESUMEN

Intravascular large B-cell lymphoma (IVLBCL) is a rare subtype of B-cell lymphoma characterized by aggressive disease progression with a high incidence of central nervous system (CNS) involvement. We retrospectively analyzed 16 patients with de novo IVLBCL treated at our hospital between 2004 and 2018 with either standard therapy plus CNS-directed therapy or standard therapy alone. CNS-directed therapy was associated with a significantly better 2-year CNS-free survival (100% vs. 63%, p = 0.0191), despite no significant effects on progression-free or overall survival. Further studies should assess CNS-focused treatment in patients with IVLBCL with or without primary CNS involvement.

17.
Cancer Diagn Progn ; 1(3): 221-229, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35399319

RESUMEN

Background/Aim: We assessed the prognosis of patients with refractory or relapsed multiple myeloma (RRMM) by focusing on the change in absolute lymphocyte counts (ALCs) after lenalidomide and dexamethasone (Ld) initiation. Patients and Methods: In total, 72 patients with RRMM were treated with Ld. ALCs were evaluated before treatment and at 1, 2, and 3 months after Ld initiation. The median ALCs in the entire cohort before and at 1, 2, 3 months after Ld initiation were 1,131, 1,059, 1,222, and 1,162/µl, respectively. Results: ALCs before Ld initiation did not affect time to next treatment (TNT) or overall survival (OS). However, the patients with ALCs equal to or greater than the median at 3 months showed relatively better TNT than those with lower lymphocyte counts, with a significant difference. OS was also significantly longer in patients with higher ALCs. Conclusion: Immunomodulation by lenalidomide may improve prognosis in patients with RRMM.

18.
Cancer Diagn Progn ; 1(2): 35-42, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35403126

RESUMEN

Background/Aim: Here, we investigated whether bortezomib as a maintenance therapy affected outcomes in transplant-ineligible patients with multiple myeloma (MM). Patients and Methods: Following induction therapy with bortezomib, maintenance therapy with bortezomib (1.3 mg/m 2 ) and dexamethasone (20 mg) was administered once or twice every 4 weeks until disease progression. The endpoints of this study were time to next treatment and overall survival. Results: Seventy-six newly diagnosed, transplant-ineligible patients were treated with a bortezomib-based regimen; 28 discontinued induction therapy, 27 did not receive maintenance therapy after induction therapy (the non-maintenance group), and 21 did (the maintenance group). In the three groups, the median times to the next required treatment were 3, 14, and 37 months, respectively. The 3-year overall survival rates were 55%, 69%, and 85%, respectively. There were no significant differences in patient characteristics between the non-maintenance and maintenance groups, except for poorer estimated glomerular filtration rates in the maintenance group. Conclusion: Bortezomib maintenance therapy may be a useful option for transplant-ineligible patients with MM.

19.
Microbiome ; 9(1): 95, 2021 04 29.
Artículo en Inglés | MEDLINE | ID: mdl-33910647

RESUMEN

BACKGROUND: Validation and standardization of methodologies for microbial community measurements by high-throughput sequencing are needed to support human microbiome research and its industrialization. This study set out to establish standards-based solutions to improve the accuracy and reproducibility of metagenomics-based microbiome profiling of human fecal samples. RESULTS: In the first phase, we performed a head-to-head comparison of a wide range of protocols for DNA extraction and sequencing library construction using defined mock communities, to identify performant protocols and pinpoint sources of inaccuracy in quantification. In the second phase, we validated performant protocols with respect to their variability of measurement results within a single laboratory (that is, intermediate precision) as well as interlaboratory transferability and reproducibility through an industry-based collaborative study. We further ascertained the performance of our recommended protocols in the context of a community-wide interlaboratory study (that is, the MOSAIC Standards Challenge). Finally, we defined performance metrics to provide best practice guidance for improving measurement consistency across methods and laboratories. CONCLUSIONS: The validated protocols and methodological guidance for DNA extraction and library construction provided in this study expand current best practices for metagenomic analyses of human fecal microbiota. Uptake of our protocols and guidelines will improve the accuracy and comparability of metagenomics-based studies of the human microbiome, thereby facilitating development and commercialization of human microbiome-based products. Video Abstract.


Asunto(s)
Metagenómica , Microbiota , ADN , Humanos , Microbiota/genética , Estándares de Referencia , Reproducibilidad de los Resultados , Análisis de Secuencia de ADN
20.
Microbiol Resour Announc ; 9(17)2020 Apr 23.
Artículo en Inglés | MEDLINE | ID: mdl-32327522

RESUMEN

We report the complete genome sequence of Flavonifractor plautii JCM 32125T (=VPI 0310T). The genome consists of a single circular chromosome of 3,985,392 bp (G+C content, 60.9%) and was predicted to contain 3 complete sets of rRNA genes, 63 tRNA genes, and 3,764 protein-coding sequences.

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