Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 174
Filtrar
Más filtros

Tipo del documento
Intervalo de año de publicación
1.
Ann Hematol ; 101(8): 1727-1739, 2022 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-35587825

RESUMEN

We report herein a multicentre retrospective analysis of 192 consecutive patients with symptomatic refractory/relapsed multiple myeloma (RRMM) treated with daratumumab in combination with bortezomib or lenalidomide as salvage therapy at 9 haematological centres in Puglia. Choice of both regimens was based on previous treatment and/or physicians' preference. Considering the under-representation of older patients (very old patient ≥ 80 years) in clinical trials and the prognostic and predictive importance and value of frailty status, here, we further characterised the patient cohort by age. The overall response rate (ORR) was generally lower than what was previously reported in the CASTOR (ORR 72.6% vs 85%) and POLLUX (ORR 86.5% vs 93%) trials. The lower ORR in our analysis compared to the CASTOR and POLLUX trials could be related to a less selected population. Similarly, amongst very old patients, the ORR was encouraging: ORR to treatment with DVd (daratumumab + bortezomib + dexamethasone) was 66.7%, and ORR to treatment with DRd (daratumumab + lenalidomide + dexamethasone) was 92.3%. Median TTP (time to progression) was 10.8 months (1-year TTP: 44.7%; 2-year TTP: 25.3%) in the DVd group; median TTP was not reached in the DRd group (1-year TTP: 82.7%; 2-year TTP: 71.4%). Median OS (overall survival) was not reached either in the DRd group (1-year OS: 85.9%; 2-year OS: 73.7%) or the DVd group (1-year OS: 70.2%; 2-year OS: 58.9%).


Asunto(s)
Mieloma Múltiple , Neoplasias de Células Plasmáticas , Anticuerpos Monoclonales , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Bortezomib , Dexametasona , Estudios de Seguimiento , Humanos , Lenalidomida , Mieloma Múltiple/tratamiento farmacológico , Estudios Retrospectivos , Terapia Recuperativa
2.
Qual Life Res ; 26(10): 2739-2754, 2017 10.
Artículo en Inglés | MEDLINE | ID: mdl-28608152

RESUMEN

PURPOSE: The main objective of this study is to gain a deeper understanding of how patients suffering from chronic myeloid leukemia (CML) cope with their illness. The study aims to reconstruct the subjective meaning-making process related to CML in order to gain insights into the impact the disease has on patients' emotions and everyday lives, as well as to explore the psychological impact of their being presented with the chance to suspend their therapy and recover from the disease. METHODS: Data were gathered from a qualitative study conducted in Italy on 158 Italian CML patients. Basing the study on the narrative inquiry approach, the patients were required to describe their patient journey in a qualitative narrative diary. These contained prompts to elicit the free expression of their needs, expectations, and priorities. A lexicographic analysis was carried out with T-LAB software and in particular a thematic analysis of elementary contexts (TAECs) and a word association analysis (WAA). RESULTS: The TAEC detected four thematic clusters related to two factors (temporal frame and contextual setting) that explained the variance among the narratives. The WAA evidenced a wide variety of emotions, both positive and negative, as patients reacted to the possibility of interrupting their therapy. CONCLUSIONS: A better understanding of patients' experiences can offer insights into promoting the development of more sustainable healthcare services and into therapeutic innovation aimed at improving patients' quality of life and at engaging them more in their treatment. The findings of this study can also help make medical professionals more aware of the patient's burden and help them identify potential interactions and emotional levers to improve clinical relationships.


Asunto(s)
Leucemia Mielógena Crónica BCR-ABL Positiva/tratamiento farmacológico , Medicina Narrativa/fisiología , Calidad de Vida/psicología , Adulto , Femenino , Humanos , Leucemia Mielógena Crónica BCR-ABL Positiva/mortalidad , Leucemia Mielógena Crónica BCR-ABL Positiva/patología , Masculino , Persona de Mediana Edad
3.
J Appl Microbiol ; 117(2): 554-63, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24797347

RESUMEN

AIM: To evaluate the use of organic acids (OAs) and competitive exclusion (CE) product administered continuously in the feed and transiently in drinking water on the control of Salmonella enterica subspecie enterica serotype Enteritidis (SE) prior to slaughter. METHODS AND RESULTS: The influence of treatments were evaluated on pH, population of the lactic acid bacteria (LAB) and bacteria of the family Enterobacteriaceae, concentration of volatile fatty acids and SE colonization in the crop and caecum. The birds were challenged with SE 24 h before being slaughtered, and then, the caeca and crop were removed and subjected to SE counts. Continuous administration of OAs reduced the population of bacteria from the Enterobacteriaceae family in both crop and caecum, positively influenced the butyric acid concentration and reduced SE colonization in the caecum. The diet supplemented with CE product positively influenced the quantity of LAB in the crop and caecum, elevated the butyric acid concentration and reduced both Enterobacteriaceae quantity and SE colonization in the caecum. There was no effect from administering the treatments via drinking water on the variables measured. CONCLUSIONS: Continuous supplementation in feed with OAs and CE product reduced SE colonization of the caeca. SIGNIFICANCE AND IMPACT OF THE STUDY: Supplementation of OAs and CE product in diet to turkeys can reduce the SE load, potentially leading to a lower contamination risk of meat during slaughter.


Asunto(s)
Enfermedades de las Aves de Corral/prevención & control , Salmonelosis Animal/prevención & control , Salmonella enteritidis , Pavos/microbiología , Alimentación Animal , Animales , Bacterias/aislamiento & purificación , Ácido Butírico/análisis , Ácidos Carboxílicos/administración & dosificación , Ciego/química , Ciego/microbiología , Buche de las Aves/química , Buche de las Aves/microbiología , Dieta , Enterobacteriaceae/aislamiento & purificación , Ácidos Grasos/administración & dosificación , Ácidos Grasos Volátiles/análisis , Concentración de Iones de Hidrógeno , Salmonella enteritidis/aislamiento & purificación
4.
Meat Sci ; 186: 108734, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-35033833

RESUMEN

Forty crossbred (Santa Ines × Dorper) male lambs were used to investigate the effect of dietary buriti oil (BOIL) intake on meat quality, fatty acid (FA) composition and sensory attributes. A completely randomized design with five BOIL intake levels (0, 12, 24, 36 and 48 g/kg DM) was used. Increasing dietary BOIL intake linearly reduced the DMI, slaughter weight, cooking loss, shear force, yellowness, 16:0, c9-18:1 FA concentrations, and the delta-9-desaturase activity index computed using c9-16:1 and 16:0 as product and substrate pair, cis-MUFA and Æ©MUFA/Æ©SFA ratio of lamb meat (P ≤ 0.05); however, increasing dietary BOIL intake quadratically increased the energy intake, lipid content and linearly increased the total FA intake, chroma, collagen, total BI, 18:0, 20:3n-6 concentration and sensory attributes of lamb meat (P ≤ 0.05), without affecting health indexes regarding fat consumption. BOIL addition at levels above 24 g/kg DM in lamb diet reduces growth, however, improves tenderness, flavor and "goat" aroma intensity and slightly changes meat FA levels, promoting better acceptance by panelists.


Asunto(s)
Grasas Insaturadas en la Dieta , Carne Roja , Alimentación Animal/análisis , Animales , Carotenoides , Dieta/veterinaria , Ácidos Grasos , Masculino , Carne/análisis , Aceites de Plantas , Carne Roja/análisis , Ovinos
5.
J Clin Oncol ; 9(3): 432-7, 1991 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-1999712

RESUMEN

The risk of second primary cancer (SPC) was evaluated in 947 patients treated for Hodgkin's disease (HD) during the period January 1969 to December 1979. The median follow-up of this series was 10.5 years (range, 9 to 19). Treatment categories included radiotherapy (RT) alone (115 patients, 12%), chemotherapy (CHT) alone (161 patients, 17%), combined RT plus CHT (381 patients, 40%), and salvage treatment for resistant or relapsing HD (290 patients, 30.6%). Fifty-six SPCs were observed, occurring between 1 and 17 years from initial treatment. Among these, secondary acute nonlymphoid leukemia (s-ANLL) was the most frequent SPC (23 cases). Secondary non-Hodgkin's lymphoma (s-NHL) occurred in 5 patients, whereas a secondary solid tumor (s-ST) was observed in 28 patients. The calculated actuarial risk (+/- SE) of developing SPC was 5.0% (+/- 0.9%) and 23.1% (+/- 5.8%) at 10 and 19 years, respectively. Concerning treatment modalities and s-ANLL risk, no cases were observed in the radiotherapy group, whereas CHT plus RT and salvage groups showed the highest actuarial risk. This was, in fact, at 10 and 19 years, 3.1% (+/- 0.9%) and 8.1% (+/- 4.0%) in the former group, and 1.8% (+/- 1.0%) and 16% (+/- 9.0%) in the latter. A statistically significant difference was observed when the CHT plus RT group was compared with CHT and RT groups (P = .04). Concerning the relationships with chemotherapeutic regimens, 12 s-ANLL cases occurred in the mechlorethamine, vincristine, procarbazine, and prednisone (MOPP) plus RT group, and only one case in the group receiving doxorubicin, bleomycin, vinblastine, and dacarbazine (ABVD) plus RT. A statistically significant difference of s-ANLL actuarial risk was found comparing patients receiving MOPP plus RT to all other treatment groups (P = .04). With respect to s-ST, the actuarial risk at 10 and 19 years was 2.0% (+/- 0.6%) and 13.0% (+/- 3.8%), respectively. No significant differences were found among groups treated with different modalities. These data were confirmed by a multivariate analysis, which indicated treatment modality and age as independent variables for s-ANLL and s-ST development, respectively. Based on the prolonged follow-up analysis, the actuarial SPC risk at 10 years hereby reported should reflect the real SPC incidence in our series.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Enfermedad de Hodgkin/tratamiento farmacológico , Leucemia Mieloide Aguda/etiología , Linfoma no Hodgkin/etiología , Análisis Actuarial , Adolescente , Adulto , Terapia Combinada/efectos adversos , Femenino , Enfermedad de Hodgkin/patología , Enfermedad de Hodgkin/radioterapia , Humanos , Italia , Leucemia Mieloide Aguda/mortalidad , Leucemia Inducida por Radiación/etiología , Estudios Longitudinales , Linfoma no Hodgkin/mortalidad , Masculino , Persona de Mediana Edad , Factores de Riesgo
6.
J Clin Oncol ; 6(9): 1411-6, 1988 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-2458439

RESUMEN

Fifty patients with recurrent Hodgkin's disease have been treated with high-dose therapy followed by autologous bone marrow transplantation. Forty-one patients had extranodal sites of relapse and 31 patients had constitutional symptoms. Two patients had been treated with mechlorethamine, vincristine, procarbazine, and prednisone (MOPP), lomustine, vinblastine, procarbazine, and prednisone (CcVPP), and radiation; 16 patients with MOPP, doxorubicin, bleomycin, vinblastine, and dacarbazine (ABVD), radiation, and lomustine, etoposide, and prednisone (CEP); 20 patients with alternating MOPP/ABVD, and 12 patients with alternating MOPP/ABVD followed by CEP and radiation. Eighteen patients had progressive disease during alternating MOPP/ABVD protocol alone or during conventional salvage therapy; 32 patients had had a complete remission with first-line therapy but later relapsed, 25 of them having received conventional salvage therapy; 12 achieved no response or progression ("resistant-relapse" patients); and 13 responded partially or completely ("sensitive-relapse" patients). Complete remission occurred in 24 patients (48%) with a median duration of 24 months and 16 patients (32%) achieved partial response with a median duration of 9 months, for an overall response rate of 80%. Ten patients failed to respond and died in progressive disease 1 to 10 months (median, 6 months) after transplantation. Toxicity was significant including infections (20%), liver enzymes and alkaline phosphatase elevations (100%), and carmustine lung toxicity (7%). There were two treatment-related deaths; one patient died of Pseudomonas aeruginosa septicemia and another patient died of cerebral hemorrhage. These results validate the procedure of high-dose therapy followed by autologous bone marrow transplantation in inducing remission in these advanced, highly-treated patients. Clearly, the question of whether high-dose therapy and transplantation will eventually supersede new conventional salvage therapies will be addressed after controlled clinical studies.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Trasplante de Médula Ósea , Enfermedad de Hodgkin/tratamiento farmacológico , Adulto , Bleomicina/administración & dosificación , Terapia Combinada , Ciclofosfamida/administración & dosificación , Dacarbazina/administración & dosificación , Doxorrubicina/administración & dosificación , Etopósido/administración & dosificación , Femenino , Enfermedad de Hodgkin/mortalidad , Enfermedad de Hodgkin/terapia , Humanos , Italia , Lomustina/administración & dosificación , Masculino , Mecloretamina/administración & dosificación , Prednimustina/administración & dosificación , Prednisona/administración & dosificación , Procarbazina/administración & dosificación , Trasplante Autólogo , Vinblastina/administración & dosificación , Vincristina/administración & dosificación
7.
J Clin Oncol ; 18(4): 773-9, 2000 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-10673518

RESUMEN

PURPOSE: A first comparative trial of fludarabine (FLU) alone versus FLU plus idarubicin (FLU-ID) for indolent or mantle-cell lymphomas. PATIENTS AND METHODS: From September 1995 to July 1998, 199 patients aged 25 to 65 years (median, 54 years) with newly diagnosed stages II to IV indolent or mantle-cell lymphomas (standard risk according to the International Prognostic Index) were enrolled onto a multicenter, 1:1 randomized study. Of the 199 patients who were able to be assessed, 101 were assigned to the FLU group (six monthly cycles of FLU 25 mg/m(2)/d on days 1 through 5) and 98 to the FLU-ID group (six monthly cycles of FLU 25 mg/m(2)/d on days 1 through 3 and idarubicin 12 mg/m(2) on day 1). RESULTS: In the FLU group, complete response (CR) and partial response rates were 47% and 37%, respectively, whereas in the FLU-ID group, they were 39% and 42%, respectively. In-depth analysis of the CR rate with respect to histologic type showed that FLU seemed to be superior to FLU-ID in treating follicular lymphomas (60% v 40%, respectively), whereas FLU-ID seemed to be more effective than FLU in treating nonfollicular lymphomas (small lymphocytic, 43% v 29%, respectively; immunocytoma, 38% v 23%, respectively; P = not significant), excluding the mantle-cell subset (in which there was no difference between the two groups). No striking differences were observed between the two protocols in terms of overall response or toxicity, which was generally mild. However, with a median follow-up of 19 months, only 29 patients (62%) who received FLU alone have maintained their initial CR, compared with 32 (84%) of those who received FLU-ID therapy (P =.021). CONCLUSION: Although the FLU-ID regimen may not significantly improve the induction of CR in most indolent-lymphoma patients, our preliminary data do suggest that, with respect to FLU alone, it may be capable of conferring a longer-lasting CR and that it might be superior in terms of CR rate in small lymphocytic and immunocytoma subtypes.


Asunto(s)
Antibióticos Antineoplásicos/administración & dosificación , Antineoplásicos/uso terapéutico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Idarrubicina/administración & dosificación , Linfoma de Células del Manto/tratamiento farmacológico , Vidarabina/análogos & derivados , Adulto , Anciano , Antibióticos Antineoplásicos/efectos adversos , Antineoplásicos/administración & dosificación , Antineoplásicos/efectos adversos , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Distribución de Chi-Cuadrado , Progresión de la Enfermedad , Femenino , Estudios de Seguimiento , Humanos , Idarrubicina/efectos adversos , Leucemia Linfocítica Crónica de Células B/tratamiento farmacológico , Modelos Lineales , Linfoma Folicular/tratamiento farmacológico , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Inducción de Remisión , Tasa de Supervivencia , Vidarabina/administración & dosificación , Vidarabina/efectos adversos , Vidarabina/uso terapéutico
8.
Leukemia ; 5 Suppl 1: 68-71, 1991.
Artículo en Inglés | MEDLINE | ID: mdl-1890870

RESUMEN

One-hundred, twenty-eight patients with Hodgkin's disease in remission or who had failed a mechlorethamine, vincristine, procarbazine and prednisone (MOPP), a doxorubicin, bleomycin, vinblastine and dacarbazine (ABVD) and/or lomustine, etoposide and prednimustine (CEP) regimens have been treated with a high-dose therapy (HDT) containing cyclophosphamide, etoposide, carmustine (CVB) and autologous bone marrow transplantation (ABMT). Forty patients were treated while they were in resistant or progressive disease states using alternating MOPP/ABVD protocol; 15 patients received ABMT in first relapse; 51 patients had a complete remission (CR) with first-line therapy but later relapsed and then received conventional salvage therapy; 16 achieved no response or progression ("resistant relapse" patients) and 35 responded partially or completely ("sensitive-relapse" patients). The other 22 patients received ABMT in remission. Following HDT, 56 patients (52.8%) achieved CR and 23 patients (21.6%) achieved a partial remission for an overall response rate of 74.4%. Sixteen patients failed to respond and died in progressive disease 1 to 10 months (median 6 months) after ABMT. High-dose therapy produced severe toxicity including vomiting (100%), mucositis (75%) and liver enzymes and alkaline phosphatase elevations (51%). There were 10 treatment-related deaths. A multivariate analysis identified poor performance status and resistant-relapse patients as very important adverse risk factors for survival immediately after ABMT. These results, while validating this procedure for inducing remissions in advanced highly-treated patients, at the same time confirm the need of employing this approach in first relapse or in second complete remission after standard therapy and before ABMT or, in first complete remission in very high risk Hodgkin's disease patients. Our experience in 15 very poor prognosis Hodgkin's disease patients transplanted in first CR demonstrated to be much significant.


Asunto(s)
Trasplante de Médula Ósea/métodos , Enfermedad de Hodgkin/terapia , Adulto , Protocolos de Quimioterapia Combinada Antineoplásica/administración & dosificación , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Femenino , Enfermedad de Hodgkin/tratamiento farmacológico , Enfermedad de Hodgkin/cirugía , Humanos , Italia , Masculino , Pronóstico , Análisis de Supervivencia , Trasplante Autólogo
9.
Leukemia ; 5 Suppl 1: 74-8, 1991.
Artículo en Inglés | MEDLINE | ID: mdl-1716338

RESUMEN

From September 1988 two hundred-sixty-seven (267) untreated patients (pts) with stage II to IV high grade non Hodgkin's lymphoma (NHL) have been enrolled in a multicenter, randomized, still ongoing study, comparing two third-generation combination chemotherapy regimens, MACOP-B versus F-MACHOP. At the present time, 177 pts have completed the treatment program and are evaluable, with a median follow-up of 13 months. Clinical, histologic and laboratory characteristics are equally distributed in both groups. Among the 92 pts treated with MACOP-B, 58 (63%) achieved a complete remission (CR), 17 complete responders have relapsed (29%), and 21 have died (23%), including 3 treatment-related deaths. Among the 85 pts who received F-MACHOP, 65 (76%) achieved a CR, 9 complete responders have relapsed (14%), and 11 pts have died (13%), including 3 treatment related deaths. 30 months-projected survival is 64% for MACOP-B treated pts compared to 84% for F-MACHOP treated pts; 30 months-projected relapse- free survival is 80% and 84%, respectively. F-MACHOP seems to be superior in immunoblastic lymphoma (overall survival, OS, 82% vs. 54%) and in Burkitt-type lymphoblastic lymphoma (OS 100% vs, 42%). The degree of hematological and non-hematological toxicity was similar in both regimens. More reliable conclusions will be drawn after a longer follow-up.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Linfoma no Hodgkin/tratamiento farmacológico , Adulto , Bleomicina/administración & dosificación , Médula Ósea/patología , Ciclofosfamida/administración & dosificación , Citarabina/administración & dosificación , Doxorrubicina/administración & dosificación , Esquema de Medicación , Femenino , Fluorouracilo/administración & dosificación , Humanos , Masculino , Metotrexato/administración & dosificación , Prednisolona/administración & dosificación , Prednisona/administración & dosificación , Análisis de Supervivencia , Vincristina/administración & dosificación
10.
Eur Ann Allergy Clin Immunol ; 37(1): 30-3, 2005 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-15745375

RESUMEN

Evidence has been cumulated during the last years concerning the immaturity of the cells involved in the local and systemic aspects of allergic inflammation. Hematopoietic precursors (HPC) are mobilized from the bone matrix as multipotent cells or, more often, as progenitors that, after the initial white-lineage commitment reach through the peripheral blood (PB) their final destinations constituted by the target organs of allergy. Although several studies have investigated the CD34+ cells traffic and location at the level of the inflamed peripheral mucosae in allergic populations, limited information is available on their behaviour on the time-course of infectious diseases. The current study thus was designed to asses the peripheral traffic of CD34+ HPC during the infectious inflammation. To this end CD34+ HPCs have been enumerated, by flow-cytometric techniques, in PB of 24 adult healthy beings (Group A), 24 adult subjects with symptomatic extrinsic allergy (Group B) and in PB of 24 adult patients hospitalised for febrile infectious pathology (Group C). CD34+ cell values ranged 0.01-0.08% with a median of 0.03 in Group A. In Group B values ranged 0.17-0.75% with a median of 0.28 and in Group C values ranged 0.00-0.12% with a median of 0.07. Variance analysis test among the three groups was statistically significant (p<0.001) supporting the conclusion that CD34+ HPC mobilizing and increased peripheral traffic is an unique feature of the allergic inflammation.


Asunto(s)
Médula Ósea/fisiopatología , Células Madre Hematopoyéticas/fisiología , Hipersensibilidad/complicaciones , Inflamación/fisiopatología , Adulto , Antígenos CD34/análisis , Linaje de la Célula , Movimiento Celular , Femenino , Fiebre/fisiopatología , Citometría de Flujo , Humanos , Infecciones/complicaciones , Inflamación/etiología , Masculino , Persona de Mediana Edad , Estrés Fisiológico/fisiopatología
11.
Leuk Res ; 39(3): 279-83, 2015 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-25636354

RESUMEN

This current retrospective multicenter analysis represents, to our knowledge, the first Italian study evaluating the efficacy and toxicity profile of "lenalidomide plus dexamethasone" as salvage therapy in patients with recurrent-refractory MM in the real life contest. Our study included patients who are usually excluded from clinical trials because of unfavorable baseline characteristics. Median OS was significantly longer in patients receiving "lenalidomide plus dexamethasone" for more than 12 months compared with those who had received "lenalidomide plus dexamethasone" for a shorter interval (P<0.0001). Median OS was not affected by best response achieved (P 0.4) and age (P 0.3). Quality of response did not correlate with number of previous lines of therapy (P 0.77) and age. Higher ORRs were recorded in the patients group with relapsed MM compared to those with refractory disease, but this difference was not statistically significant (P 0.38).


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Resistencia a Antineoplásicos/efectos de los fármacos , Mieloma Múltiple/tratamiento farmacológico , Recurrencia Local de Neoplasia/tratamiento farmacológico , Terapia Recuperativa , Adulto , Anciano , Anciano de 80 o más Años , Dexametasona/administración & dosificación , Femenino , Estudios de Seguimiento , Humanos , Lenalidomida , Masculino , Persona de Mediana Edad , Mieloma Múltiple/mortalidad , Mieloma Múltiple/patología , Recurrencia Local de Neoplasia/mortalidad , Recurrencia Local de Neoplasia/patología , Estadificación de Neoplasias , Pronóstico , Estudios Retrospectivos , Tasa de Supervivencia , Talidomida/administración & dosificación , Talidomida/análogos & derivados
12.
AIDS ; 7(6): 823-7, 1993 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-8363758

RESUMEN

OBJECTIVE: To assess the efficacy and the mechanism of action of alpha-interferon (alpha-IFN) in the treatment of HIV-related thrombocytopenia. METHODS: Thirteen HIV-positive subjects [nine men and four women with severe thrombocytopenia (platelets, < or = 30 x 10(9)/l)] were treated with alpha-IFN 2b alone at a dose of 3 x 10(6) U three times a week for 5 weeks. Haematological parameters, platelet kinetic and bone-marrow myeloid progenitor cultures [megakaryocyte colony-forming units (CFU-MK); granulocyte macrophage CFU (CFU-GM) and erythroid burst-forming units (BFU-E)] were evaluated before and after treatment in responsive subjects. RESULTS: Seven out of 13 subjects showed a partial response (platelets, 50-149 x 10(9)/l) after alpha-IFN 2b therapy. Platelet survival as evaluated by 111In-oxine significantly increased, while platelet turnover showed a slight but not statistically significant increase after treatment. The growth of bone-marrow myeloid progenitor cells decreased after alpha-IFN 2b therapy, again without statistical significance. CONCLUSION: alpha-IFN 2b may increase the platelet count in HIV-positive subjects with severe symptomatic thrombocytopenia by prolonging platelet survival. The immunomodulatory and antiviral action of this drug may be responsible for prolonged platelet survival.


Asunto(s)
Complejo Relacionado con el SIDA/complicaciones , Interferón-alfa/uso terapéutico , Trombocitopenia/terapia , Complejo Relacionado con el SIDA/sangre , Adulto , Enfermedades Autoinmunes/sangre , Enfermedades Autoinmunes/complicaciones , Enfermedades Autoinmunes/terapia , Supervivencia Celular , Células Cultivadas , Ensayo de Unidades Formadoras de Colonias , Evaluación de Medicamentos , Células Precursoras Eritroides/efectos de los fármacos , Células Precursoras Eritroides/patología , Eritropoyetina/farmacología , Femenino , Factor Estimulante de Colonias de Granulocitos y Macrófagos/farmacología , Hematopoyesis/efectos de los fármacos , Humanos , Interferón alfa-2 , Interleucina-3/farmacología , Masculino , Megacariocitos/efectos de los fármacos , Megacariocitos/patología , Recuento de Plaquetas/efectos de los fármacos , Púrpura Trombocitopénica Idiopática/sangre , Púrpura Trombocitopénica Idiopática/complicaciones , Púrpura Trombocitopénica Idiopática/terapia , Proteínas Recombinantes/farmacología , Trombocitopenia/sangre , Trombocitopenia/complicaciones , Trombocitopenia/patología
13.
Gene ; 30(1-3): 69-77, 1984 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-6096225

RESUMEN

A bifunctional plasmid (pMP358) able to replicate and to express cloned human dihydrofolate reductase cDNA (cDHFR) in both Escherichia coli and Bacillus subtilis was constructed. The expression of cDHFR in B. subtilis was the result of a deletion that placed the cDNA fragment under the control of the chloramphenicol acetyltransferase (CAT) gene promoter of Staphylococcus aureus plasmid pC194. By sequence analysis of plasmid pMP358, we observed a gene fusion occurring between the cDHFR and the 32nd codon of the CAT gene. We report that such a "hybrid" gene is able to direct the synthesis of a 25-kDal "hybrid" protein, which was found to be inducible by supplementing B. subtilis cells with sublethal doses of chloramphenicol.


Asunto(s)
Bacillus subtilis/genética , Cloranfenicol/farmacología , ADN/genética , Tetrahidrofolato Deshidrogenasa/genética , Acetiltransferasas/genética , Secuencia de Bases , Cloranfenicol O-Acetiltransferasa , Escherichia coli/genética , Regulación de la Expresión Génica/efectos de los fármacos , Vectores Genéticos , Humanos , Hibridación Genética , Operón , Plásmidos , Tetrahidrofolato Deshidrogenasa/biosíntesis
14.
Semin Oncol ; 17(6 Suppl 10): 3-8; discussion 8-9, 1990 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-1701924

RESUMEN

From September 1984 to July 1986, 70 previously untreated patients with Stage II to IV intermediate- or high-grade non-Hodgkin's lymphoma (according to the International Working Formulation) were enrolled in a phase III comparative trial. The objectives of the study were to compare the efficacy and safety of using mitoxantrone instead of doxorubicin in the combination chemotherapeutic regimen m-BACOD (intermediate-dose methotrexate, bleomycin, Adriamycin [doxorubicin, Adria Laboratories], cyclophosphamide, Oncovin [vincristine, Eli Lilly and Company], and dexamethasone). Seventy patients were randomly assigned to receive either m-BN (Novantrone; mitoxantrone, American Cyanamid Company) COD or m-BACOD. The complete-response rate was 57% in both treatment groups, and no significant differences in overall or relapse-free survival were recorded between the two groups. Patients treated with m-BACOD experienced severe alopecia more frequently (P less than .001) and reported six adverse cardiac events of grade greater than 1 whereas neither was observed among those receiving m-BNCOD. The mitoxantrone-containing regimen was found to have an equivalent efficacy and reduced clinical toxicity in comparison to the standard doxorubicin-containing regimen in patients with poor-prognosis non-Hodgkin's lymphomas.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Linfoma no Hodgkin/tratamiento farmacológico , Adulto , Anciano , Alopecia/inducido químicamente , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Bleomicina/administración & dosificación , Ciclofosfamida/administración & dosificación , Dexametasona/administración & dosificación , Doxorrubicina/administración & dosificación , Esquema de Medicación , Femenino , Estudios de Seguimiento , Humanos , Leucovorina/administración & dosificación , Leucopenia/inducido químicamente , Linfoma no Hodgkin/mortalidad , Masculino , Metotrexato/administración & dosificación , Persona de Mediana Edad , Mitoxantrona/administración & dosificación , Mucosa Bucal , Estadificación de Neoplasias , Neutropenia/inducido químicamente , Recurrencia , Inducción de Remisión , Estomatitis/inducido químicamente , Volumen Sistólico/efectos de los fármacos , Tasa de Supervivencia , Vincristina/administración & dosificación
15.
Transplantation ; 47(2): 385-7, 1989 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-2645722

RESUMEN

Avidin-biotin immunoadsorption, a technique based on the high affinity between the protein avidin and the vitamin biotin, has been used to remove neoplastic plasma cells from the bone marrow of patients with multiple myeloma. Buffy coat cells obtained from 25 patients were first incubated with monoclonal antibodies (MoAb) capable of recognizing plasma cell-associated antigens (i.e., 8A, 8F6, 62B1, and cocktails of 8A plus 8F6 or 62B1), then with biotinylated goat antimouse immunoglobulin, and passed over a column containing avidin conjugated to Sepharose GMB. Both non-linked and linked cells were analyzed by immunofluorescence and morphological staining. The results showed that over 98% of plasma cells were removed by using 8A or 8F6 alone, while 99.5% +/- 0.4 SD of plasma cell purging was achieved with 2 associated MoAb. In addition, the overall recovery of committed granulocyte-macrophage (CFU-GM),* erythroid (BFU-e), and multilineage (CFU-GEMM) progenitors after column treatment ranged from 39% +/- 15 SD to 50% +/- 6 SD, from 15% +/- 2 SD to 39% +/- 7 SD, and from 16 +/- 4 SD to 64% +/- 10 SD, according to the MoAb employed. On this basis avidin-biotin immunoadsorption appears to be a suitable technique for ex-vivo manipulation of bone marrow infiltrated by neoplastic plasma cells.


Asunto(s)
Anticuerpos Monoclonales/toxicidad , Médula Ósea/patología , Técnicas de Inmunoadsorción , Depleción Linfocítica , Mieloma Múltiple/patología , Avidina , Biotina , Médula Ósea/inmunología , Supervivencia Celular , Humanos , Depleción Linfocítica/métodos , Mieloma Múltiple/inmunología , Células Plasmáticas/inmunología , Células Plasmáticas/patología , Células Tumorales Cultivadas/patología
16.
Chest ; 101(3): 674-9, 1992 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-1541131

RESUMEN

Twelve obese patients (six male subjects) aged 17 to 42 years with a mean body mass index (BMI) of 40 kg/m2 and 12 normal subjects (six male subjects) aged 19 to 39 years with a mean BMI of 22 kg/m2 underwent a cycloergometric test until exhaustion to assess work capacity and cardiopulmonary adaptations of the two groups. Minute ventilation, expiratory gas concentrations, and heart rate, together with anaerobic threshold (AT) were determined in each subject during the test. The same subjects were then submitted to normocapnic hyperpnea at rest to assess the oxygen cost of breathing. We found that in the obese patients, the maximal sustainable work rate was not different from that of controls (120 vs 136 W) while AT was significantly lower (78 vs 110 W). Nevertheless, there was no difference in maximum VO2 and in VO2 at AT levels (expressed in milliliters per minute) indicating that cardiac, pulmonary, vascular, and muscle performance did not differ from obese to normal subjects. Greater muscular effort was needed by obese patients when moving their heavier legs and less when doing external work with a decreased gross mechanical efficiency and an identical net mechanical efficiency between the two groups.


Asunto(s)
Adaptación Fisiológica , Prueba de Esfuerzo , Hemodinámica , Obesidad/fisiopatología , Mecánica Respiratoria , Adolescente , Adulto , Umbral Anaerobio , Volumen de Reserva Espiratoria , Femenino , Capacidad Residual Funcional , Frecuencia Cardíaca , Humanos , Masculino , Persona de Mediana Edad , Consumo de Oxígeno , Trabajo Respiratorio
17.
Bone Marrow Transplant ; 23(10): 1085-6, 1999 May.
Artículo en Inglés | MEDLINE | ID: mdl-10373077

RESUMEN

In May 1989, a 43-year-old woman with chronic myelocytic leukemia diagnosed in 1988 underwent a syngeneic bone marrow transplant (BMT), conditioned with cyclophosphamide-TBI while in chronic phase. Three years later, because of both cytogenetic and hematological relapse, she was treated with interferon-alpha (IFN-alpha) and hydroxyurea (HU) for 3 years. In 1994 while still in chronic phase, she was conditioned with busulfan-cyclophosphamide (BU-CY) and underwent a second syngeneic BMT. In 1996, following a further cytogenetic and hematological relapse, she was again placed on IFN-alpha and HU therapy for 13 months, when she was referred to our hospital in accelerated phase. In October 1997 following thiotepa, CY and anti-thymocyte globulin conditioning, she underwent an allogeneic BMT from her 1-Ag mismatched brother. She became Ph1 negative with full chimerism and normal hematological parameters; acute graft-versus-host disease (GVHD) grade 3 of the skin and chronic GVHD of the liver occurred. At 11 months follow-up she is in good clinical condition and with a Karnofsky score of 90%. The role of a graft-versus-leukemia (GVL) effect in securing and maintaining the complete remission is discussed.


Asunto(s)
Trasplante de Médula Ósea , Leucemia Mielógena Crónica BCR-ABL Positiva/terapia , Leucemia Mieloide de Fase Acelerada/terapia , Adulto , Trasplante de Médula Ósea/inmunología , Femenino , Enfermedad Injerto contra Huésped/inmunología , Humanos , Masculino , Recurrencia , Acondicionamiento Pretrasplante , Trasplante Homólogo , Trasplante Isogénico
18.
Bone Marrow Transplant ; 32(4): 433-6, 2003 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-12900781

RESUMEN

Hematological malignancies in Jehovah's Witnesses are often difficult to cure since these patients deny transfusions. By a retrospective analysis, we report the possibility of treating some tumors, mostly hematological, with either autologous or allogeneic bone marrow transplantation (BMT) without blood support. Eight patients were evaluated, including lymphoma (two patients), acute lymphoblastic (one patient) and myeloblastic (one patient) leukemia, chronic lymphocytic leukemia (one patient), refractory anemia with blasts in transformation (one patient), chronic myeloid leukemia (one patient) and metastatic breast cancer (one patient). All patients experienced a severe cytopenia with no major side effects or life-threatening complications. We had four deaths: three from relapse and progression of the disease (at 5, 8 and 15 months after the stem cell infusion), and one from acute intestinal GVHD (at 2 months after the stem cell infusion). Four patients are in complete clinical remission (at 8, 10, 16 and 26 months after the stem cell infusion), and this was related to the disease outcome. We conclude that autologous and allogeneic BMT are feasible without the support of transfusions. We believe that this should be performed as soon as possible in the course of the disease.


Asunto(s)
Transfusión Sanguínea , Trasplante de Médula Ósea/métodos , Testigos de Jehová , Leucemia/terapia , Linfoma/terapia , Agonistas Mieloablativos/uso terapéutico , Adolescente , Adulto , Anemia/terapia , Progresión de la Enfermedad , Femenino , Humanos , Leucemia Linfocítica Crónica de Células B/terapia , Leucemia Mielógena Crónica BCR-ABL Positiva/terapia , Leucemia Mieloide Aguda/terapia , Masculino , Persona de Mediana Edad , Leucemia-Linfoma Linfoblástico de Células Precursoras/terapia , Recurrencia , Religión y Medicina , Estudios Retrospectivos , Factores de Tiempo , Acondicionamiento Pretrasplante , Resultado del Tratamiento , Negativa del Paciente al Tratamiento
19.
Bone Marrow Transplant ; 23(12): 1273-8, 1999 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-10414915

RESUMEN

An interim report evaluating the feasibility of myeloablative therapy followed by peripheral blood stem cell (PBSC) autotransplant in patients aged >60 years is presented. In the last 2 years 19 patients >60 years old with several oncological conditions, mostly hematological, underwent PBSC autotransplant either as salvage therapy following relapse or resistance to conventional treatment, or as consolidating therapy as a part of a well defined protocol. There were 13 males and six females; the mean age was 66.9 years (range 61-76 years); nine patients had resistant or relapsed lymphoma, six myeloma, two acute leukemia, one Waldenstrom's disease and one lung cancer. Myeloablative schemes included BEAM exclusively for lymphomas, busulfan and melphalan (Bu-MPH) mainly for myeloma, busulfan and cyclophosphamide (Bu-CTX) for lymphomas and leukemia and VP-16 and CTX for lung cancer. Mobilization of CD34+ cells was achieved in all patients with the combination of high-dose CTX and G-CSF with collections between 2.83 to 19.04 x 10(6)/kg (mean 7.1). All patients engrafted with a median time for recovery of PMN (>0.5 x 10(3)/microl) of 10 days (range 8-12 days) and for PLT (>20 x 10(3)/microl) of 12 days (range 10-17 days). Major responses were obtained in 15 of 16 patients evaluable for response and eight patients entered CR; overall eight patients are in CR, five are alive with disease, five are dead from disease progression and one is dead because of congestive heart failure 7 months following PBSC autotransplant. No early deaths following the procedure occurred; major side-effects were grade I-II mucositis (58%), fever with documented sepsis (10%), pneumonia (5%), cardiac, renal and liver toxicity (5%). Cardiac function was evaluated before and after myeloablative therapy by VEF in all patients; no significant modifications were necessary. In conclusion, our experience demonstrates that myeloablative therapies in older selected patients can be feasible; the feasibility of introducing PBSC autotransplantation following myeloablative therapy as a front-line treatment in patients aged >60 years, needs accurate guide lines for selection of appropriate patients.


Asunto(s)
Trasplante de Células Madre Hematopoyéticas , Acondicionamiento Pretrasplante , Anciano , Antígenos CD34 , Estudios de Factibilidad , Femenino , Neoplasias Hematológicas/fisiopatología , Neoplasias Hematológicas/terapia , Movilización de Célula Madre Hematopoyética , Humanos , Masculino , Persona de Mediana Edad , Volumen Sistólico , Trasplante Autólogo
20.
Bone Marrow Transplant ; 4(1): 69-74, 1989 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-2647189

RESUMEN

The kinetics of marrow engraftment was retrospectively analysed in 55 patients with malignant lymphoma (ML) and 31 patients with acute lymphoblastic leukemia (ALL) after marrow-ablative therapy followed by autologous bone marrow transplantation. Thirty-eight percent of patients with ML, most of whom were transplanted in relapse and 13% of patients with ALL, mostly transplanted in remission, showed failed or delayed engraftment. Analysis of the total patient group showed that failure to recover platelet counts was significantly correlated with detection of disease in the marrow early after transplantation (p less than 0.001). Platelet recovery was also correlated with survival (p = 0.0001), disease-free survival (p = 0.0001), and the probability of relapse (p = 0.02). In those patients achieving engraftment, multivariate regression analysis failed to reveal any single in vitro test of marrow nucleated cell or progenitor cell numbers that significantly influenced time to achieve recovery of either granulocyte or platelet counts.


Asunto(s)
Trasplante de Médula Ósea , Linfoma/cirugía , Leucemia-Linfoma Linfoblástico de Células Precursoras/cirugía , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Médula Ósea/patología , Terapia Combinada , Estudios de Evaluación como Asunto , Supervivencia de Injerto , Hematopoyesis , Humanos , Linfoma/tratamiento farmacológico , Linfoma/patología , Recuento de Plaquetas , Leucemia-Linfoma Linfoblástico de Células Precursoras/tratamiento farmacológico , Leucemia-Linfoma Linfoblástico de Células Precursoras/patología , Estudios Retrospectivos , Trasplante Autólogo
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA