Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 27
Filtrar
Más filtros

Banco de datos
Tipo del documento
País de afiliación
Intervalo de año de publicación
1.
Proc Natl Acad Sci U S A ; 117(21): 11685-11691, 2020 05 26.
Artículo en Inglés | MEDLINE | ID: mdl-32393644

RESUMEN

Human T cell leukemia virus 1 (HTLV-1) causes the functionally debilitating disease HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) as well as adult T cell leukemia lymphoma (ATLL). Although there were concerns that the mortality of HAM/TSP could be affected by the development of ATLL, prospective evidence was lacking in this area. In this 5-y prospective cohort study, we determined the mortality, prevalence, and incidence of ATLL in 527 HAM/TSP patients. The standard mortality ratio of HAM/TSP patients was 2.25, and ATLL was one of the major causes of death (5/33 deaths). ATLL prevalence and incidence in these patients were 3.0% and 3.81 per 1,000 person-y, respectively. To identify patients at a high risk of developing ATLL, flow cytometry, Southern blotting, and targeted sequencing data were analyzed in a separate cohort of 218 HAM/TSP patients. In 17% of the HAM/TSP patients, we identified an increase in T cells positive for cell adhesion molecule 1 (CADM1), a marker for ATLL and HTLV-1-infected cells. Genomic analysis revealed that somatic mutations of HTLV-1-infected cells were seen in 90% of these cases and 11% of them had dominant clone and developed ATLL in the longitudinal observation. In this study, we were able to demonstrate the increased mortality in patients with HAM/TSP and a significant effect of ATLL on their prognosis. Having dominant clonal expansion of HTLV-1-infected cells with ATLL-associated somatic mutations may be important characteristics of patients with HAM/TSP who are at an increased risk of developing ATLL.


Asunto(s)
Leucemia-Linfoma de Células T del Adulto , Paraparesia Espástica Tropical , Anciano , Progresión de la Enfermedad , Femenino , Virus Linfotrópico T Tipo 1 Humano , Humanos , Leucemia-Linfoma de Células T del Adulto/diagnóstico , Leucemia-Linfoma de Células T del Adulto/epidemiología , Leucemia-Linfoma de Células T del Adulto/patología , Masculino , Paraparesia Espástica Tropical/diagnóstico , Paraparesia Espástica Tropical/epidemiología , Paraparesia Espástica Tropical/mortalidad , Paraparesia Espástica Tropical/patología , Pronóstico , Estudios Prospectivos
2.
Rinsho Ketsueki ; 63(2): 94-98, 2022.
Artículo en Japonés | MEDLINE | ID: mdl-35264508

RESUMEN

A 21-year-old man presented with bone marrow failure, short stature, fatty degeneration of the pancreas on CT images, and Shwachman-Bodian-Diamond syndrome (SBDS) gene abnormalities (exon 2: c.258+2T>C and deletion of exon 3). Thus, the patient was diagnosed with Shwachman-Diamond syndrome (SDS). In the clinical course, the patient developed acute myeloid leukemia (AML). Hematopoietic stem cell transplantation from the human-leukocytic-antigen-haploidentical father of the patient was performed. The patient was conditioned with 150 mg/m2 fludarabine, 6.4 mg/kg busulfan, and 4 Gy total body irradiation. Graft-versus-host disease prophylaxis included tacrolimus, micophenolate mofetil, and posttransplant cyclophosphamide. Although the patient achieved a complete remission on day 21, AML relapsed on day 434 after the transplantation. He died of sepsis. The prognosis of patients with SDS and AML is poor. Adult-onset cases must be recognized, and transplantation should be performed during bone marrow failure.


Asunto(s)
Enfermedad Injerto contra Huésped , Trasplante de Células Madre Hematopoyéticas , Leucemia Mieloide Aguda , Busulfano/uso terapéutico , Enfermedad Injerto contra Huésped/prevención & control , Humanos , Leucemia Mieloide Aguda/complicaciones , Leucemia Mieloide Aguda/genética , Leucemia Mieloide Aguda/terapia , Masculino , Síndrome de Shwachman-Diamond , Acondicionamiento Pretrasplante , Irradiación Corporal Total
3.
Rinsho Ketsueki ; 61(2): 103-109, 2020.
Artículo en Japonés | MEDLINE | ID: mdl-32147608

RESUMEN

A 69-year-old woman with leukocytopenia and thrombocytopenia was referred to our hospital. Her bone marrow comprised 70.5% abnormal promyelocytes that were positive for myeloperoxidase/CD33/CD117 and CD13 (dim) and negative for CD2/CD34/CD56 and HLA-DR. Chromosome analysis of the bone marrow showed t (12;17;15) (p13;q21;q22), and fluorescence in situ hybridization revealed the PML-RARA fusion signal only on the derivative chromosome 15. The patient was diagnosed with acute promyelocytic leukemia (APL) with PML-RARA and was treated using all-trans retinoic acid (ATRA). In peripheral blood (PB), PML-RARA-positive polymorphonuclear cells (PMNs) appeared on the second week and became negative on the sixth week after treatment, whereas PML-RARA-negative PMNs started to increase in number on the sixth week. Molecular remission was confirmed on the 10th week. Quantitative evaluation of the differentiated leukemic cells of APL and recovered cells from normal hematopoiesis in PB can provide useful information for a safer induction therapy. No significant difference was noted in the kinetics of the leukemic cells under ATRA treatment as well as in the clinical features between our patient without RARA-PML and those with t (15;17), which is a cytogenetic evidence for the critical role of PML-RARA in the pathogenesis of APL.


Asunto(s)
Leucemia Promielocítica Aguda , Anciano , Cromosomas Humanos , Femenino , Humanos , Hibridación Fluorescente in Situ , Cinética , Leucemia Promielocítica Aguda/genética , Proteínas de Fusión Oncogénica , Translocación Genética , Tretinoina
4.
Haematologica ; 104(7): 1417-1421, 2019 07.
Artículo en Inglés | MEDLINE | ID: mdl-30523053

RESUMEN

The so-called "double-hit" and "double-protein-expression" lymphoma with MYC and BCL2 rearrangements is a rare, mature B-cell neoplasm characterized by a germinal center B-cell phenotype, abundant protein expression of MYC and BCL2, rapid disease progression, and a poor prognosis. In this study, we showed the potential benefit of the BCL2 inhibitor venetoclax in the treatment of this disease. Immunohistochemical studies of the lymphoma tissues confirmed that overexpression of MYC and BCL2 was observed more frequently in this subtype than in other germinal center B-cell-like diffuse large B-cell lymphomas. In contrast, another pro-survival protein MCL1 was less expressed in this subtype, even when compared with its expression in the non-"double-hit" and "double-protein-expression" type. Furthermore, in vitro studies using two "double-hit" and "double-protein-expression" lymphoma-derived cell lines, Karpas231 and OCI-Ly8, clearly showed that a low concentration of venetoclax, but not the MCL1 inhibitor S63845, was sufficient to induce apoptosis in the two lines, compared with in other germinal center B-cell-derived cell lines, BJAB and SU-DHL10. These results indicate that the survival of this type of lymphoma depends predominantly on BCL2 rather than on MCL1. Unexpectedly, we found that venetoclax not only disrupts the interaction between BCL2 and the pro-apoptotic protein BIM, but also leads to dephosphorylation of BCL2 and further downregulates MCL1 protein expression, probably through modulation of the protein phosphatase 2A B56α activity in Karpas231 and OCI-Ly8. Indeed, a low concentration of venetoclax induced substantial apoptosis in the primary lymphoma cells, regardless of high protein expression of MCL1 associated with venetoclax resistance. Venetoclax clearly triggers the signal transduction related to BCL2 and MCL1 in "double-hit" and "double-protein-expression" lymphoma cells.


Asunto(s)
Antineoplásicos/farmacología , Apoptosis/efectos de los fármacos , Compuestos Bicíclicos Heterocíclicos con Puentes/farmacología , Reordenamiento Génico , Linfoma de Células B Grandes Difuso/patología , Proteínas Proto-Oncogénicas c-bcl-2/antagonistas & inhibidores , Proteínas Proto-Oncogénicas c-myc/antagonistas & inhibidores , Sulfonamidas/farmacología , Proliferación Celular/efectos de los fármacos , Humanos , Linfoma de Células B Grandes Difuso/tratamiento farmacológico , Linfoma de Células B Grandes Difuso/genética , Proteínas Proto-Oncogénicas c-bcl-2/genética , Proteínas Proto-Oncogénicas c-myc/genética , Células Tumorales Cultivadas
5.
Cancer Sci ; 109(4): 1254-1262, 2018 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-29363227

RESUMEN

Peripheral T- or natural killer (NK)-cell lymphomas are rare and difficult-to-recognize diseases. It remains arduous to distinguish between NK cell- and cytotoxic T-lymphocyte-derived lymphomas through routine histological evaluation. To clarify the cells of origin, we focused on NK-cell receptors and examined the expression using immunohistochemistry in 22 cases with T- and NK-cell neoplasms comprising angioimmunoblastic T-cell lymphoma, anaplastic lymphoma kinase (ALK)-positive and -negative anaplastic large-cell lymphomas, extranodal NK/T-cell lymphoma, nasal type, monomorphic epitheliotropic intestinal T-cell lymphoma, aggressive NK-cell leukemia, and other peripheral T-cell lymphomas. Inhibitory receptor leukocyte immunoglobulin-like receptor subfamily B member 1 (LILRB1) was detected in 14 (64%) cases, whereas activating receptors DNAM1, NKp46, and NKG2D were expressed in 7 (32%), 9 (41%), and 5 (23%) cases, respectively. Although LILRB1 was detected regardless of the disease entity, the activating NK-cell receptors were expressed predominantly in TIA-1-positive neoplasms (DNAM1, 49%; NKp46, 69%; and NKG2D, 38%). In addition, NKp46 and NKG2D were detected only in NK-cell neoplasms and cytotoxic T-lymphocyte-derived lymphomas including monomorphic epitheliotropic intestinal T-cell lymphoma. One Epstein-Barr virus-harboring cytotoxic T-lymphocyte-derived lymphoma mimicking extranodal NK/T-cell lymphoma, nasal type lacked these NK-cell receptors, indicating different cell origin from NK and innate-like T cells. Furthermore, NKG2D expression showed a negative impact on survival among the 22 examined cases, which mainly received the standard chemotherapy regimen (log-rank test, P = .024). We propose that the presence of activating NK-cell receptors may provide new insights into understanding peripheral T-cell lymphomas and characterizing them as innate-like T-cell neoplasm.


Asunto(s)
Células Asesinas Naturales/metabolismo , Linfoma de Células T Periférico/metabolismo , Subfamilia K de Receptores Similares a Lectina de Células NK/metabolismo , Linfocitos T Citotóxicos/metabolismo , Adulto , Anciano , Quinasa de Linfoma Anaplásico , Antígenos de Diferenciación de Linfocitos T/metabolismo , Femenino , Humanos , Receptor Leucocitario Tipo Inmunoglobulina B1/metabolismo , Linfoma Anaplásico de Células Grandes/metabolismo , Masculino , Persona de Mediana Edad , Receptor 1 Gatillante de la Citotoxidad Natural/metabolismo , Proteínas Tirosina Quinasas Receptoras/metabolismo , Adulto Joven
7.
Rinsho Ketsueki ; 59(3): 269-274, 2018.
Artículo en Japonés | MEDLINE | ID: mdl-29618683

RESUMEN

A 73-year-old man with left parotid gland swelling over 2 months was referred to our hospital in March 201X. Purpura on the lower legs had been recurrent for >20 years. Biopsy of the parotid gland demonstrated diffuse infiltration of abnormal lymphocytes that were negative for CD10 and positive for CD19, CD20, and κ-chain. The Ki-67 positivity was <10%; lymphoepithelial lesions were observed. The patient was diagnosed with extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma). Chromosome analysis revealed t (X;14) (p11.2;q32), and fluorescence in situ hybridization (FISH) of metaphase spreads showed three signals of the immunoglobulin heavy chain (IGH) gene on the derivative chromosomes X and 14, besides the normal chromosome 14. CT findings of parotid glands were suggestive of Sjogren syndrome, and biopsy of the purpura on the leg demonstrated leukocytoclastic vasculitis. In the literature, only seven patients with lymphoma and t (X;14) translocation have been reported. Of these, five patients had MALT lymphoma, one had nodal marginal zone lymphoma, and one had diffuse large B-cell lymphoma. In all patients, lymphoma evolved from previous autoimmune diseases. It is suggested that MALT lymphoma with the t (X;14) translocation forms a new entity of lymphoma.


Asunto(s)
Linfoma de Células B de la Zona Marginal/diagnóstico , Vasculitis Leucocitoclástica Cutánea/patología , Anciano , Cromosomas Humanos Par 14/genética , Cromosomas Humanos X/genética , Humanos , Hibridación Fluorescente in Situ , Linfoma de Células B de la Zona Marginal/genética , Masculino , Translocación Genética
8.
BMC Clin Pathol ; 17: 21, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-29151814

RESUMEN

BACKGROUND: B-cell lymphomas harboring the 8q24/MYC plus 18q21/BCL2 translocations are now referred to as high grade B-cell lymphoma with MYC and BCL2 and/or BCL6 rearrangements (HGBL-MBR). Although HGBL-MBR is frequently found in cases with diffuse large B-cell lymphoma or Burkitt lymphoma-like B-cell lymphoma, acute lymphoblastic leukemia (ALL)-like disease of HGBL-MBR (AL-HGBL-MBR) has been reported incidentally. CASE PRESENTATION: A 69-year-old Japanese woman developed remittent fever and increasing systemic bone pain. The bone marrow examination revealed that more than 90% of nuclear cells were blastoid cells, which were positive for CD10, CD19, CD20, and surface IgMκ and negative for terminal deoxynucleotidyl transferase (TdT). Cytogenetic studies confirmed that the patient had de novo AL-HGBL-MBR with the extra copies of MYC and loss of chromosome 17p. She showed resistance to chemoimmunotherapy and died seven months after the diagnosis. The literature review identified further 47 de novo AL-HGBL-MBR cases within the last 32 years. The median age was 61 years (range, 27 - 86); the male/female ratio was 2.0. Thirty-eight cases (79%) presented a clinical picture of ALL at diagnosis; 14 (36%) of 39 available cases showed central nervous system involvement. Loss of 17p and translocations at 2p12-13, 3q27, 9p13 were frequently observed as additional cytogenetic abnormalities. Although the median survival of 46 available cases was only five months (range, 0.1-18), rituximab use significantly improved the survival of AL-HGBL-MBR (log-rank test, P = 0.0294). CONCLUSION: Our patient and most reported de novo AL-HGBL-MBR cases showed resistance to conventional chemoimmunotherapy and disastrous consequences. AL-HGBL-MBL is a rare, but should be considered a distinct clinical condition in HGBL-MBR. Other therapeutic strategies, such as using inhibitors of MYC and BCL2, are needed to overcome the chemoresistance of AL-HGBL-MBR.

9.
Rinsho Ketsueki ; 58(1): 3-8, 2017.
Artículo en Japonés | MEDLINE | ID: mdl-28190862

RESUMEN

A 69-year-old man diagnosed with leukocytosis was referred to our hospital in July 201X. The patient was diagnosed as having a myelodysplastic/myeloproliferative neoplasm. However, he presented with leukemia 2 months later. Chromosomal analysis of a bone marrow sample documented that this patient had a normal karyotype. The patient was successfully treated with idarubicin and cytarabine, and he underwent three courses of consolidation therapy. However, he suffered a relapse in May of the following year. A cytogenetic analysis revealed the presence of a t (3;21) (q13;q22) translocation, and fluorescence in situ hybridization of metaphase spreads detected three signals corresponding to the runt related transcription factor 1 (RUNX1) on the derivative chromosomes 3 and 21, besides the normal chromosome 21. Chromosomal translocations in leukemia often involve genes encoding transcription factors, and the RUNX1 is a common target for such translocations. To the best of our knowledge, this is a novel variant of the RUNX1 translocation. Identifying genes associated with translocations in leukemia contributes to novel insights into the mechanisms of disease progression and chemotherapy resistance and also facilitates the development of molecularly targeted therapies.


Asunto(s)
Cromosomas Humanos Par 21 , Cromosomas Humanos Par 3 , Subunidad alfa 2 del Factor de Unión al Sitio Principal/genética , Leucemia Mieloide Aguda/genética , Translocación Genética , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Resultado Fatal , Humanos , Cariotipificación , Leucemia Mieloide Aguda/tratamiento farmacológico , Masculino
10.
Rinsho Ketsueki ; 58(4): 315-322, 2017.
Artículo en Japonés | MEDLINE | ID: mdl-28484159

RESUMEN

A 70-year-old man with pancytopenia was referred to our hospital. His bone marrow comprised 75.4% leukemic blast cells and increased micromegakaryocytes. The leukemic cells were positive for myeloperoxidase and expressed CD2, CD13, CD33, CD34, CD56, CD117, HLA-DR, and MYC. Chromosomal analysis revealed 45,XY,t (3;8) (q26.2;q24),-7[6]/46,XY[14]. Fluorescence in situ hybridization revealed the rearrangement of the ecotropic viral integration site 1 (EVI1) gene. Thus, the patient was diagnosed as having acute myeloid leukemia (AML) with maturation, according to the WHO classification; he achieved complete cytogenetic remission after two courses of combination chemotherapy using anthracyclines and cytarabine. The t (3;8) translocation is a rare simple variant of the 3q26.2/EVI1 translocation, which is an adverse prognostic factor of AML. Clarifying the clinical features of leukemia in patients with simple variant translocations facilitates the development of therapies.


Asunto(s)
Cromosomas Humanos Par 3 , Cromosomas Humanos Par 8 , Proteínas de Unión al ADN/genética , Leucemia Mieloide Aguda/genética , Proto-Oncogenes/genética , Factores de Transcripción/genética , Translocación Genética , Anciano , Antraciclinas/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Citarabina/administración & dosificación , Humanos , Leucemia Mieloide Aguda/tratamiento farmacológico , Proteína del Locus del Complejo MDS1 y EV11 , Masculino
13.
Int J Hematol ; 118(6): 772-775, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-37578593

RESUMEN

A 45-year-old man who was a sibling donor for allogeneic peripheral blood stem cell transplantation (allo-PBSCT) was administered 7.2 mg of pegfilgrastim for stem cell collection. Peripheral blood stem cells were collected 4 days after administration of pegfilgrastim (Day 4) and 4.32 × 106 /kg of CD34-positive cells per recipient body weight were obtained. Fever of 38 ℃ or higher and left submandibular pain appeared on Day 6. Ultrasonography and contrast-enhanced computed tomography (CT) showed wall thickening of the carotid artery and the abdominal aorta. We carefully excluded the possibilities of cardiovascular and autoimmune diseases by thorough examination, and ultimately diagnosed pegfilgrastim-induced aortitis. The patient's fever resolved rapidly after treatment with prednisolone (PSL) 1 mg/kg. We began to taper PSL after eight days. Sixty-one days after starting PSL, we confirmed that abdominal aortic wall thickening had improved by contrast-enhanced CT. We continued to taper off PSL and stopped 141 days later with no relapse thereafter. This is the first case report of pegfilgrastim-induced aortitis in an allo-PBSCT donor. Careful monitoring is warranted when administering pegfilgrastim to donors even without past medical history.


Asunto(s)
Aortitis , Trasplante de Células Madre Hematopoyéticas , Células Madre de Sangre Periférica , Masculino , Humanos , Persona de Mediana Edad , Factor Estimulante de Colonias de Granulocitos/efectos adversos , Aortitis/terapia , Aortitis/inducido químicamente , Filgrastim/efectos adversos
14.
Int J Hematol ; 118(6): 758-765, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-37700187

RESUMEN

A 78-year-old man presenting with leukocytosis was admitted to our hospital. The patient was asymptomatic and showed no lymphadenopathy. Peripheral blood flow cytometry revealed a leukemic-phase B-cell lymphoma with medium-to-large abnormal cells with reticulum. Positron emission tomography/computed tomography revealed abnormal uptake in the right orbit, bone marrow, and spleen. We performed immunological staining and fluorescence in situ hybridization on tissues extracted from the right orbit and bone marrow, which led to the diagnosis of mucosa-associated lymphoid tissue (MALT) lymphoma. Polymerase chain reaction analysis of immunoglobulin heavy chain rearrangements in the right orbital mass and bone marrow suggested that they were identical clones. Based on these collective findings, the diagnosis of leukemic-phase MALT lymphoma was confirmed, with sites of involvement including the bone marrow, peripheral blood, right orbit, and spleen. This is a highly rare case of leukemic MALT lymphoma.


Asunto(s)
Linfoma de Células B de la Zona Marginal , Masculino , Humanos , Anciano , Linfoma de Células B de la Zona Marginal/patología , Hibridación Fluorescente in Situ , Médula Ósea/patología , Tomografía Computarizada por Tomografía de Emisión de Positrones , Cadenas Pesadas de Inmunoglobulina/genética
15.
J Am Chem Soc ; 134(41): 16925-8, 2012 Oct 17.
Artículo en Inglés | MEDLINE | ID: mdl-23013038

RESUMEN

The ideal driving force for dye regeneration is an important parameter for the design of efficient dye-sensitized solar cells. Here, nanosecond laser transient absorption spectroscopy was used to measure the rates of regeneration of six organic carbazole-based dyes by nine ferrocene derivatives whose redox potentials vary by 0.85 V, resulting in 54 different driving-force conditions. It was found that the reaction follows the behavior expected for the Marcus normal region for driving forces below 29 kJ mol(-1) (ΔE = 0.30 V). Driving forces of 29-101 kJ mol(-1) (ΔE = 0.30-1.05 V) resulted in similar reaction rates, indicating that dye regeneration is diffusion controlled. Quantitative dye regeneration (theoretical regeneration yield 99.9%) can be achieved with a driving force of 20-25 kJ mol(-1) (ΔE ≈ 0.20-0.25 V).

16.
Front Microbiol ; 13: 874998, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35464987

RESUMEN

Systemic chronic active Epstein-Barr virus infection (sCAEBV) is an EBV-positive T- or NK-cell neoplasm revealing persistent systemic inflammation. Twenty-five percent of sCAEBV patients accompany angiopathy. It is crucial to clarify the mechanisms of angiopathy development in sCAEBV because angiopathy is one of the main causes of death. Interleukin-1ß (IL-1ß) is reported to be involved in angiopathy onset. We investigated if IL-1ß plays a role as the inducer of angiopathy of sCAEBV. We detected elevated IL-1ß levels in four out of 17 sCAEBV patient's plasma. Interestingly, three out of the four had clinically associated angiopathy. None of the other patients with undetectable level of IL-1ß had angiopathy. In all patients with high plasma levels of IL-1ß and vascular lesions, EBV-infected cells were CD4-positive T cells. In one patient with high plasma IL-1ß, the level of IL-1ß mRNA of the monocytes was 17.2 times higher than the level of the same patient's EBV-infected cells in peripheral blood. In Ea.hy926 cells, which are the models of vascular endothelial cells, IL-1ß inhibited the proliferation and induced the surface coagulation activity. IL-1ß is a potent biomarker and a potent therapeutic target to treat sCAEBV accompanying angiopathy.

17.
Int J Hematol ; 113(5): 675-681, 2021 May.
Artículo en Inglés | MEDLINE | ID: mdl-33515158

RESUMEN

Initial staging by positron emission tomography/computed tomography (PET/CT) scanning is recommended for patients with diffuse large B-cell lymphoma (DLBCL). Whether both PET/CT and bone marrow biopsy (BMB) are required remains unclear. This study examined whether staging by PET/CT is sufficient. Participants with untreated DLBCL assessed using both PET/CT and BMB were included. Patients received independent diagnostic assessments from a radiologist and a hematopathologist. Both hematoxylin-eosin staining and CD20 immunostaining were performed to determine the bone marrow involvement in BMB. A total of 84 patients were included. The number of patients with positive bone marrow involvement identified by PET/CT and BMB was 16 (19%) and 22 (26%), respectively. Eight (10%) patients showed positive results in both tests. When considering BMB as a reference, PET/CT showed 36% sensitivity and 87% specificity, with positive and negative predictive values of 50% and 79%, respectively. BMB-positive patients had shorter progression-free (PFS) and overall (OS) survival than their BMB-negative counterparts. Compared to PET/CT-negative patients, patients with positive results did not show any significant differences in PFS and OS. However, among 16 PET/CT-positive patients, poor PFS and OS were observed among patients who were also BMB positive. BMB remains a mandatory step in staging of untreated DLBCL patients.


Asunto(s)
Médula Ósea/patología , Linfoma de Células B Grandes Difuso/diagnóstico , Adulto , Anciano , Anciano de 80 o más Años , Biopsia , Médula Ósea/diagnóstico por imagen , Femenino , Humanos , Linfoma de Células B Grandes Difuso/diagnóstico por imagen , Linfoma de Células B Grandes Difuso/patología , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Tomografía Computarizada por Tomografía de Emisión de Positrones , Pronóstico , Adulto Joven
18.
Int J Hematol ; 109(5): 572-577, 2019 May.
Artículo en Inglés | MEDLINE | ID: mdl-30887274

RESUMEN

Light-chain plasma cell myeloma (LC-PCM) is a PCM subtype in which only immunoglobulin light-chain is secreted. However, the absence of immunoglobulin heavy-chain (IGH) production in this condition has not been fully elucidated. To address this issue, we retrospectively analyzed patients at our center with LC-PCM and found a group who had only split signals of IGH gene derived from 14q32/IGH translocations by fluorescence in situ hybridization (FISH). Six patients were identified with only split signals of the IGH gene derived from 14q32/IGH translocations. Five of these patients were newly diagnosed, while one had IgG-λ PCM at presentation, which transformed to λ LC-PCM after treatment. The translocation partners were identified in four patients: two cases of (11;14)(q13;q32) and two cases of (4;14)(p16;q32). The development of LC-PCM appears to be explained by the application of allelic exclusion in these patients, such that 14q32/IGH translocation in one allele contributes to the pathogenesis of PCM and the subsequent loss of the other allele is responsible for the loss of IGH production. These findings suggest that a FISH pattern of IGH with "split and loss" may constitute a unique subgroup of LC-PCM.


Asunto(s)
Cromosomas Humanos Par 14/genética , Cadenas lambda de Inmunoglobulina , Leucemia de Células Plasmáticas/genética , Pérdida de Heterocigocidad , Translocación Genética , Anciano , Cromosomas Humanos Par 11/genética , Cromosomas Humanos Par 4/genética , Femenino , Humanos , Cadenas Pesadas de Inmunoglobulina/genética , Masculino , Persona de Mediana Edad , Proteínas de Neoplasias/genética
19.
J Am Chem Soc ; 130(52): 17874-81, 2008 Dec 31.
Artículo en Inglés | MEDLINE | ID: mdl-19067515

RESUMEN

Electron diffusion coefficient, lifetime, and density in the TiO(2) electrode of dye-sensitized TiO(2) solar cells (DSCs) employing I(-)/I(3)(-) redox couples were measured with eight different metal-free organic dyes and three Ru complex dyes. At matched electron density, all DSCs using organic dyes (ODSCs) showed shorter electron lifetime with comparable or larger diffusion coefficients in comparison to the DSCs using the Ru dyes (RuDSC). The shorter lifetime was attributed partially to the slower dye cation reduction rate of the organic dyes by I(-), faster electron diffusion coefficient in the TiO(2), and mostly higher I(3)(-) concentration in the vicinity of the TiO(2) surface. Whereas a slight shift of the conduction band edge potential (E(cb)) of the TiO(2) was seen with a few organic dyes, no correlation was found with the dipole moment of the adsorbed dyes. This implies that the adsorbed dyes interact with cations in the electrolyte, so the direction of the dipole is altered or simply screened. The increase of [I(3)(-)] in the vicinity of the TiO(2) surface was interpreted with partial charge distribution of the dyes. Under one-sun conditions, less electron density due to shorter electron lifetime was found to be the main reason for the lower values of V(oc) for all ODSCs in comparison to that of RuDSCs. Among the organic dyes, having larger molecular size and alkyl chains showed longer electron lifetime, and thus higher V(oc). Toward higher open circuit voltage, a design guide of organic dyes controlling the electron lifetime is discussed.

20.
Int J Hematol ; 108(4): 460, 2018 10.
Artículo en Inglés | MEDLINE | ID: mdl-30101404

RESUMEN

In the original publication of the article, Table 2 was published incorrectly. The column names were swapped under the column heading "Prom (%)". The correct column names are PB and BM.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA