Biomedical subjects

E M Neidhardt-Berard

Publications and source records attributed to E M Neidhardt-Berard.

6 recordsLinked to original sources

PubMed1999

Infections following peripheral blood progenitor cell transplantation for lymphoproliferative malignancies: etiology and potential risk factors.

PURPOSE: We sought to describe the infections that occur after large-dose chemotherapy, which was followed by autologous peripheral blood progenitor cell transplantation, and to determine their risk factors. PATIENTS AND METHODS: We retrospectively analyzed the occurrence and the characteristics of infections in 277 consecutive patients who received intensive chemotherapy for non-Hodgkin's lymphoma (n = 207), Hodgkin's disease (n = 27), or multiple myeloma (n = 43) in a single institution. Conditioning regimens included total body irradiation in 47% of the cases. Infections occurring within the 30 days after transplant were defined as early infections, whereas infections after that time in patients who had achieved a neutrophil count greater than 1.0 x 10(9)/L (1,000 per microL) were considered as late infections. RESULTS: Within the first 30 days, 172 patients had unexplained fever (62%); infections were documented in 83 patients (30%), most commonly bacteremia (57 patients). Late infections occurred in 64 (26%) of 244 evaluable patients and consisted mainly of varicella zoster virus infections (n = 36) and pneumonia (n = 16). Administration of total body irradiation [odds ratio (OR) = 2.50; 95% confidence interval (CI) 1.4 to 4.5; P = 0.002) and previous use of fludarabine (OR 2.5; CI 1.2 to 5.2; P = 0.02) and a diagnosis of myeloma (OR 2.6; CI 1.2 to 5.6; P = 0.04) were significantly associated with late infections. CONCLUSIONS: This study confirms that infectious toxicity after peripheral blood progenitor cell transplantation is usually moderate, although bacteremia remains a serious problem. Late infections are encountered in about 25% of patients and are more common in those with myeloma, or those who received total body irradiation or fludarabine.

Adolescent↗

PubMed1998

High CD34(+) cell counts decrease hematologic toxicity of autologous peripheral blood progenitor cell transplantation.

Optimal numbers of CD34(+) cells to be reinfused in patients undergoing peripheral blood progenitor cell (PBPC) transplantation after high-dose chemotherapy are still unknown. Hematologic reconstitution of 168 transplantations performed in patients with lymphoproliferative diseases was analyzed according to the number of CD34(+) cells reinfused. The number of days from PBPC reinfusion until neutrophil recovery (>1.0 x 10(9)/L) and unsustained platelet recovery (>50 x 10(9)/L) were analyzed in three groups defined by the number of CD34(+) cells reinfused: a low group with less than or equal to 2.5 x 10(6) CD34(+) cells/kg, a high group with greater than 15 x 10(6) CD34(+) cells/kg, and an intermediate group to which the former two groups were compared. The 22 low-group patients had a significantly delayed neutrophil (P < .0001) and platelet recovery (P < .0001). The 41 high-group patients experienced significantly shorter engraftment compared with the intermediate group with a median of 11 (range, 8 to 16) versus 12 (range, 7 to 17) days for neutrophil recovery (P = .003), and a median of 11 (range, 7 to 24) versus 14 (range, 8 to 180+) days for platelet recovery (P < .0001). These patients required significantly less platelet transfusions (P = .002). In a multivariate analysis, the amount of CD34(+) cells reinfused was the only variable showing significance for neutrophil and platelet recovery. High-group patients had a shorter hospital stay (P = .01) and tended to need fewer days of antibotic administration (P = .12). In conclusion, these results suggest that reinfusion of greater than 15 x 10(6) CD34(+) cells/kg after high-dose chemotherapy for lymphoproliferative diseases further shortens hematopoietic reconstitution, reduces platelet requirements, and may improve patients' quality of life.

Adolescent↗

PubMed1998

Plasma levels of tumour necrosis factor and its soluble receptors correlate with clinical features and outcome of Hodgkin's disease patients.

A prospective study was performed to assess the use of plasma measurement of tumour necrosis factor (TNF), lymphotoxin alpha (LT alpha) and their soluble receptors (p55 and p75) for prognostic risk assignment in 61 patients with Hodgkin's disease. Plasma levels of TNF, p55 and p75, but not of LT alpha, were higher in Hodgkin's disease patients than in healthy controls. Plasma levels of TNF, p55 and p75 were associated with several prognostic factors for Hodgkin's disease, including those related to the host (age, performance status) and to the tumour (disease stage, extranodal site involvement, bulky tumour, serum levels of LDH and beta2-microglobulin, histology). Elevated plasma levels of TNF, p55 and p75 were also associated with several parameters reflecting an immune activation, including the presence of B symptoms, elevated serum levels of gammaglobulins, alkaline phosphatase and fibrinogen, as well as peripheral monocytosis, anaemia and low serum albumin levels. Finally, elevated TNF ligand receptor plasma markers were associated with a lower incidence of complete response to therapy and predicted shorter free-from-progression survival and overall survival of the patients. These results indicate that the plasma levels of TNF and its soluble receptors correlate with clinical features and outcome of patients with Hodgkin's disease.

Adolescent↗

PubMed1998

Factors associated with successful mobilization of peripheral blood progenitor cells in 200 patients with lymphoid malignancies.

Peripheral blood progenitor cells (PBPC) were mobilized and harvested in 200 patients treated for non-Hodgkin's lymphoma (n = 148), Hodgkin's disease (n = 22) and multiple myeloma (n = 30). The variables predicting the collection of a minimal (>2.5 x 10(6)/kg) or a high (>10 x 10(6)/kg) CD34+ cell count were analysed. Patients were mobilized with haemopoietic growth factors following either standard chemotherapy (n = 49) or high-dose cyclophosphamide, given alone (n = 55) or combined with high-dose VP16 (n = 86). 10 patients received haemopoietic growth factors only. The first mobilization resulted in a PBPC harvest with enough CD34+ cells in 179/200 patients (90%). High-dose cyclophosphamide, with or without VP16, did not mobilize a higher progenitor cell yield than standard chemotherapy. When performing multiple regression analysis in the 190 patients who received chemotherapy-containing mobilization, only the number of previous chemotherapy regimens and the exposure to fludarabine predicted for a failure to collect a minimal PBPC count (P=0.06 and 0.0008 respectively). The target to collect a high CD34+ cell count was negatively associated with the number of previous chemotherapy regimens (P=0.002). When only non-Hodgkin's lymphoma patients were considered for multivariate analysis, low-grade histology with fludarabine appeared to be associated with poor PBPC cell yield (P=0.08 and 0.005 respectively). This data confirms that PBPC harvest should be planned early in the disease course in transplant candidates, and can be obtained after a standard course of chemotherapy.

Adolescent↗

PubMed1997

Intensive therapy with peripheral stem cell transplantation in 16 patients with mantle cell lymphoma.

BACKGROUND: Despite improved detection of mantle cell lymphoma (MCL), results of its treatment with conventional therapies remain disappointing and the survival rate poor. The role of high-dose chemotherapy has recently been investigated but no potential benefit has been clearly established. We report here our experience with MCL patients treated with intensive chemotherapy and autologous stem cell transplantation (ASCT). PATIENTS AND METHODS: Of the 16 MCL patients who received high-dose chemotherapy and ASCT beginning in 1989, six were treated in first-line and 10 in sensitive relapse. Twelve of 16 patients received regimens which included total body irradiation. All patients received peripheral blood stem cells (PBSC) with the exception of one, who underwent bone marrow transplantation. RESULTS: Three patients died of toxic effects of treatment, Three months after transplant, seven achieved complete response, (CR) and two partial responses (PR), two were stable and two had progressed. With a median follow-up after transplant of 22 months, five of the six surviving patients were without progression, and three were in CR. The median times for event-free survival (EFS) and overall survival (OS) were, respectively, 249 and 317 days. The expected three-year EFS and OS were 24%. The median survival after diagnosis was only 29 months. None of the criteria appeared to be significantly associated with a better outcome, but first-line intensification and a short delay after initial diagnosis may be favorable. CONCLUSION: In this study we were not able to confirm the hypothetical benefit of high-dose chemotherapy and PBSC transplantation in mantle cell lymphoma, even though this approach may be promising in a subgroup of patient.

Antineoplastic Agents, Alkylating↗

PubMed1997

Tumor necrosis factor ligand-receptor system can predict treatment outcome in lymphoma patients.

PURPOSE: A prospective study was performed to assess plasma measurement of tumor necrosis factor (TNF), lymphotoxin alpha (LTalpha), and their soluble receptors (p55 and p75) for prognostic risk assignment in patients with malignant lymphomas. PATIENTS AND METHODS: One hundred forty-two patients, 124 with non-Hodgkin's lymphoma (NHL) and 18 with Hodgkin's disease (HD), were analyzed. Plasma samples were tested by enzyme-linked immunoabsorbent assay (ELISA). RESULTS: Elevated plasma levels of TNF, p55,and p75 were associated with an Eastern Cooperative Oncology Group (ECOG) status > or = 2, Ann Arbor stage III/IV, elevated serum lactate dehydrogenase (LDH) and beta2-microglobulin levels, > or = two involved extranodal sites, B symptoms, anemia, and low serum albumin level. Elevated levels of p55 and p75 were associated with older age and higher values of C-reactive protein. TNF, p55, and p75, but not LTalpha, plasma levels higher than median predicted shorter freedom from progression (FFP) survival and overall survival. Three distinct risk groups for patient outcome were identified: patients with low risk (TNF, p55, and p75 below median values), intermediate risk (one or two parameters higher than median), and high risk (all three parameters higher than median). At a median follow-up duration of 25 months, the actuarial 2-year FFP survival rates were 79%, 60%, and 37%, respectively (P < .0001), and overall survival rates were 91%, 82%, and 51% (P < .0001). The addition of the TNF ligand-receptor-based model to the International Prognostic Index (IPI) yielded a significant improvement of the predictive value of IPI. CONCLUSION: TNF and its soluble receptors' plasma measurements represent valuable prognostic markers in lymphoma patients.

Antigens, CD↗