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Biomedical subjects

F Oberling

Publications and source records attributed to F Oberling.

At least 19 recordsLinked to original sources
PubMed2002

Randomized, controlled, dose-range study of Ro 25-8315 given before and after a high-dose combination chemotherapy regimen in patients with metastatic or recurrent breast cancer patients.

PURPOSE: To evaluate the safety, pharmacokinetics, and efficacy of three different dose levels of pegylated granulocyte colony-stimulating factor (Ro 25-8315) on progenitor cell mobilization and hematologic recovery in cancer patients. PATIENTS AND METHODS: Breast cancer patients (n = 36) were randomly assigned to receive before (part I) and after (part II) chemotherapy either a single-dose injection of Ro 25-8315 (20 microg/kg, n = 9; 60 microg/kg, n = 9; 100 microg/kg, n = 10) or a standard daily dose of filgrastim (part I, 10 microg/kg/d; part II, 5 microg/kg/d) (control group, n = 8). RESULTS: Overall, Ro 25-8315 was well tolerated. In part I, more progenitor cell mobilization was observed with Ro 25-8315 100 microg/kg. The peak of circulating CD34(+) cells was obtained at day +5 in the four groups, and the absolute neutrophil count (ANC) returned to less than 20 x 10(9)/L by day +15. In part II, high levels of circulating CD34(+) cells (> 20 cells/microL) were obtained in all four groups. The chemotherapy-induced neutropenia (< 1 x 10(9)/L) was similar in the four groups. Ro 25-8315 100 microg/kg was more effective than filgrastim in reducing the number of patients with an ANC less than 0.5 x 10(9)/L on day +12 after chemotherapy. CONCLUSION: A single injection of Ro 25-8315 100 microg/kg might be the optimal dose for steady-state peripheral-blood progenitor cell mobilization. A single injection of 20, 60, or 100 microg/kg could be as efficient as daily administration of filgrastim to correct chemotherapy-induced cytopenia. The optimal dose of Ro 25-8315 should be determined according to the planned chemotherapy regimen.

Adult↗
PubMed1998

Adhesive and/or signaling functions of CD44 isoforms in human dendritic cells.

The regulation and function of the CD44 family of surface glycoproteins were investigated in human monocyte-derived dendritic cells (DCs). Variant CD44 isoform transcripts encoding exons v3, v6, and v9 are differently regulated during the differentiation of monocytes into DCs. TNF-alpha treatment, which induces the maturation of DCs, up-regulates the expression of all v3-, v6-, and v9-containing isoforms examined. CD44 molecules are involved in the adhesion of DCs to immobilized hyaluronate (HA), and v3- and v6-containing variants participate in this function, whereas anti-CD44v9 mAbs were unable to inhibit DC adhesion to HA. The consequences of ligand binding to CD44 were examined by culturing DCs on dishes coated with HA or various anti-CD44 mAbs. HA, the anti-pan CD44 mAb J173, and mAbs directed against v6- and v9-containing (but not v3-containing) isoforms provoked DC aggregation, phenotypic and functional maturation, and the secretion of IL-8, TNF-alpha, IL-1beta, and granulocyte-macrophage CSF. In addition, IL-6, IL-10, and IL-12 were released by DCs stimulated with either J173 or HA, although these cytokines were not detected or were found only at low levels in the culture supernatants of DCs treated with anti-CD44v6 or anti-CD44v9 mAbs. Our study points to distinct capacities of the v3-, v6-, and v9-containing isoforms expressed by human DCs to mediate cell adhesion to HA and/or a signal inducing DC maturation and the secretion of cytokines.

Cell Adhesion↗
PubMed1998

Paclitaxel-anthracycline combination chemotherapy in relapsing advanced ovarian cancer after platinum-based chemotherapy: a pilot study.

Despite high response rates with platinum-based front-line chemotherapy, the prognosis for advanced ovarian carcinoma (AOC) is poor. Salvage chemotherapy for recurrent AOC was of little benefit before paclitaxel as single-agent therapy showed appreciable efficacy. Anthracyclines are effective, but are not often part of first-line therapy. In this pilot study, we investigated the feasibility of an anthracycline plus paclitaxel combination therapy for recurrent AOC. Twenty-four patients received 150 mg/m2 paclitaxel on day 1, with either 50 mg/m2 doxorubicin on day 1 or 75 mg/m2 epirubicin on day 1 every 3 weeks. A 27% overall response rate was obtained. Myelosuppression was the major toxicity, but was manageable. No myocardiac toxicity was observed. We conclude that paclitaxel-anthracyclines is a promising salvage combination therapy in AOC that should be investigated further.

Adolescent↗
PubMed1998

Polyethylenimine-mediated transfection of human monocytes with the IFN-gamma gene: an approach for cancer adoptive immunotherapy.

Human monocytes (Mo) and monocyte-derived macrophages (MdM) are major effectors in host defense systems against cancer. Their antitumoral activity is dependent upon two processes: recruitment and activation. One of the most powerful activators for these cells is recombinant human IFN-gamma (rhIFN-gamma). However, when the potential of activated rhIFN-gamma was evaluated in clinical trials by ex vivo adoptive cellular immunotherapy protocols, the major problem was the short duration of ex vivo activation by rhIFN-gamma. Thus repeated injections were required to obtain a clinical response. To overcome this limitation we have developed a gene transfer protocol with IFN-gamma cDNA and polyethylenimine so as to obtain an efficient, long-lasting autocrine cytocidal activation in transfected human Mo/MdM. We show, by clonogenic assays, that efficient transfection and tumoricidal activity can be obtained by this method in human monocyte populations. Although the proposed model must be improved before clinical use, IFN-gamma producing monocytes have potential for adoptive immunotherapy.

Coculture Techniques↗
PubMed1998

Randomized trial of recombinant human interleukin-3 versus placebo in prevention of bone marrow depression during first-line chemotherapy for ovarian carcinoma.

PURPOSE: To determine whether recombinant human interleukin-3 (rhIL-3) reduces bone marrow depression and improves chemotherapeutic schedule adherence in ovarian cancer patients receiving first-line combination chemotherapy. PATIENTS AND METHODS: In a randomized multicenter study, 185 patients received carboplatin (dose based on projected area under the concentration-time curve [AUC]=4) and cyclophosphamide (750 mg/m2) day 1, every 3 weeks for six cycles. Patients were randomized to receive rhIL-3 (5 microg/kg) or placebo once daily subcutaneously on days 3 to 12. RESULTS: Adherence to chemotherapeutic regimen, mean chemotherapy cycle length, tumor response rate, and median survival at 24 months did not differ between groups. The number of side effects-primarily allergic reactions, flu-like symptoms and fever-were higher in the rhIL-3 group, which resulted in 21 discontinuations compared with one in the placebo group. Compared with placebo, the rhIL-3 group had higher platelet counts day 1 of cycles 2 to 6. The number of patients with World Health Organization (WHO) grade IV thrombocytopenia or number of platelet transfusions did not differ. Leukocyte counts differed only in cycles 1 and 2 between groups. The leukocyte nadir occurred earlier in the rhIL-3 (day 12) than in the placebo group (day 15, P=.006). Leukocytes and neutrophils were only higher in the rhIL-3 group day 1 of cycle 2. In cycles 4 and 5, more patients with WHO grade IV neutropenia received rhIL-3 (P < .005). Eosinophil counts were higher day 1 of cycles 2 to 6 in the rhIL-3 group (P < .0001). CONCLUSION: rhIL-3 had stimulatory hematopoietic effects. This did not result either in reduction of platelet transfusions or in improvement of chemotherapeutic schedule adherence. There were more side effects in the rhIL-3 group than in the placebo group. rhIL-3 at 5 microg/kg/d is, therefore, not of clinical benefit in this chemotherapeutic regimen.

Adult↗
PubMed1998

[Pseudo-acute surgical abdomen and acute leukemia].

The so-called pseudo-acute abdomen has been reported in acute leukemia, both at diagnosis or relapse. The clinical presentation may be misleading and life-threatening, due to the possible infiltration of any abdominal viscera. The authors present a series of eight patients and emphasize the management specificities of such patients and the possibility of long-term remissions, regardless of the severity of the initial presentation.

Abdomen, Acute↗
PubMed1997

Monocyte/macrophages as effector cells in cancer immunotherapy.

Among the different strategies which have been developed for immunotherapy of cancer, adoptive immunotherapy uses leucocytes activated in vitro and reinfused into the patients. Five leucocytes subsets can be employed for this immunotherapy with activated autologous cells. Blood monocytes can be isolated in high purity and large numbers and under special culture conditions differentiated into macrophages for adoptive transfer. Once activated ex vivo, these cells display very high antibody dependent and independent specific cytotoxicity for tumour cells, are capable of phagocytosis of cancer cells and, as antigen presenting, cells are able to involve CTL in the anticancer response. As the understanding of this activation to cytotoxicity is only recent, the present paper first provides a literature review of the main points in the field. Our own results are then discussed in relation to the development of a clinical protocol for adoptive transfer of MAK (macrophage activated killer) cells, a therapeutic strategy having a pivotal role in the immunosurveillance of cancer.

Cell- and Tissue-Based Therapy↗
PubMed1997

CD44 isoforms with exon v6 and metastasis of primary N0M0 breast carcinomas.

New isoforms of CD44 with alternatively spliced exons have recently been described. Expression of exon v6 seems to be of particular interest. It has indeed been associated with poorer outcome of breast cancer patients with node invasion at diagnosis. However, no data were available for patients N0M0 (with neither metastasis nor node invasion at diagnosis). Moreover, previous statistical analyses were realized using immunohistochemical methods to detect CD44v6 expression although several variants with exon v6 have been described. We investigated expression of isoforms containing CD44v6 using an RT-PCR approach and a panel of 25 normal breast specimens, 10 mammary fibroadenomas, 8 cystic samples and 52 primary breast tumors (38 invasive N0M0). Normal breasts, fibroadenomas, and cysts all express the same variant, A (with exon v6 only), while several transcripts are amplified in tumors. Expression of variants other than A correlates with acquisition of a malignant phenotype. Invasive cancers also express additional variants in comparison with in situ carcinomas. Metastasis capacities seem to be associated with transcription of variants other than A but also with no transcription of some of them, variants D (with exons v6 and v10) and L (with exons v6 to v10). Expression of variants D and L correlates with higher percentages of disease-free survival and better outcome. Expression of CD44 splice variants with exon v6, as detected by RT-PCR, might be a useful prognostic factor for breast cancer. However, since the series size is small, our results need to be confirmed by later studies on a larger number of patients.

Adult↗
PubMed1997

Primary hepatic lymphoma associated with chronic hepatitis C.

Like other viruses (i.e Epstein'Barr virus), the role of hepatitis C virus is suspected in the pathogenesis of lymphoproliferative disorders. We report one case of primary hepatic malignant lymphoma associated with chronic hepatitis C viral infection. The diagnosis was obtained by percutaneous liver biopsy showing a non-Hodgkin's diffuse large cell lymphoma and micronodular cirrhosis. Serology for hepatitis C virus positivity was known three years before lymphoma diagnosis. Staging of the lymphoma confirmed multinodular primary hepatic lymphoma with no other detectable localisation. Complete remission has been obtained with aggressive chemotherapy. The role of hepatitis C virus in the pathogenesis of the lymphoma is unknown. An indirect mechanism is suspected. Chronic inflammation may evolve from polyclonal lymphocytic proliferation to true non-Hodgkin's lymphoma, as it has been suggested for non-Hodgkin's lymphoma in the emergence of cryoglobulinemia in hepatitis C positive patients.

Chronic Disease↗
PubMed1996

CD44 exon 6 expression as a possible early prognostic factor in primary node negative breast carcinoma.

Breast cancer is the most common female malignancy affecting approximately one woman in eight. Many attempts have been made to define markers which may have potential clinical applications in diagnosis as well as therapy. New isoforms of CD44 with alternative spliced exons have recently been described. We studied the expression of CD44 exon 6 using a semi-quantitative RT-PCR reaction on a panel of 25 normal breast specimens, 10 mammary fibroadenomas, eight cystic samples and 52 primary breast tumors. Significant correlation was found between CD44 exon 6 expression and the overall survival of the N-M-population, P = 0.032, (logrank test by Mantel's method). The same result was also observed for the disease-free survival, P = 0.000002 (logrank test by Mantel's method). CD44 exon 6 expression, as detected by our RT-PCR-based method, might be a useful prognostic indicator of metastasis in breast cancer. However, these preliminary results need to be confirmed by later retrospective and prospective studies on a larger number of patients.

Adult↗
PubMed1996

5-Fluorouracil versus 5-fluorouracil plus alpha-interferon as treatment of metastatic colorectal carcinoma. A randomized study.

BACKGROUND: In 1989, S. Wadler reported very promising results (76% response rate) with a combination of 5-fluorouracil (5-FU) plus alpha-2a interferon (IFN) in the treatment of metastatic colorectal carcinoma (MCRC). In vitro, there are several potential explanations for synergism between the two agents. We therefore decided in 1989 to start a randomized study comparing 5-FU alone with 5-FU plus IFN. PATIENTS AND METHODS: 105 non-pretreated patients with measurable metastatic colorectal carcinoma entered into this study. The patients were randomly allocated either in arm A (n = 49) with 5-FU: 750 mg/m2 i.v. CI d1-d5 followed by 750 mg/m2 i.v. bolus once a week, or in arm B (n = 56) with 5-FU as in arm A plus IFN 9 x 10(6) IU sub-cutaneously three times a week. RESULTS: After two months of treatment we observed 1 CR and 2 PR in arm A (response rate 6.1%), 3 CR and 8 PR in arm B (response rate 19.6%), i.e., a significant difference (P = 0.05). Event-free survival was significantly higher in arm B (6 months) than in arm A (2 months) (P < 0.01), while median survival was slightly higher in arm B (12 months) than in arm A (10 months) (P < 0.05). For overall survival the difference was not significant after adjustment on center treatment and baseline Karnofsky status (P = 0.13). Toxicity was also greater in arm B. Sixteen percent of patients in arm A and 36% in arm B experienced certain grade 3-4 side effects (P < 0.05). CONCLUSION: 5-FU plus IFN is more effective than 5-FU alone in terms of response rate, event free survival but not of overall survival. 5-FU plus IFN is more toxic. As IFN has no demonstrated efficacy in MCRC as a single agent, this study suggests that IFN is acting as a 5-FU modulatory agent. The response rate observed (19.6%) is similar to the results obtained elsewhere with 5-FU plus leucovorin.

Adult↗