Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1569-8041
    Keywords: colorectal cancer ; second-line chemotherapy ; 5-fluorouracil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: A previous phase I trial in 14 pretreated patients with progressive advanced colorectal cancer demonstrated 750 mg/m2 to be the maximum tolerable dose of 5-fluorouracil (5-FU) administered as a 5-day continuous infusion modulated by short infusions of 100 mg/m2 folinic acid twice daily. The dose-limiting toxicities were hand-foot syndrome and severe mucositis. A response rate of 21% and 50% stable disease could be achieved. In order to determine the effectiveness and tolerability, we initiated a multicenter phase II trial applying a 650 mg/m2 recommended dose of 5-FU and 100 mg/m2 folinic acid twice daily every three weeks. Patients and methods: From January 1994 to July 1996, 88 advanced and progressive colorectal cancer patients either previously treated with a bolus schedule of 5-FU and folinic acid (34 patients) or without (54 patients) previous chemotherapy were included in this trial. Results: In the group of previously treated patients, therapy led to 6% (2 of 34 patients) remissions while stable disease could be observed in 68% (23 of 34 patients) of the patients. The median survival time was 14 months. The main toxicity was mucositis grade 3 in 15% of the previously treated patients and 10% in the nonpretreated patients. In the population of nonpretreated patients, the overall response rate was 15% (eight of 54 patients) and stable disease could be induced in 67% (36 of 54 patients). The median survival time was 13.7 months. Conclusion: This regimen is an active second-line therapy in advanced colorectal cancer with minimal toxicity, thus preserving the quality of life during palliative chemotherapy. Antitumor activity in previously untreated patients does not seem superior to that obtained with weekly regimens applying 24- or 48-hour continuous infusions of 5-FU and folinic acid.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1432-1335
    Keywords: Key words Colorectal cancer ; LAK cell activity ; Prothymosin α1 ; Cytokines ; Adhesion molecules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effects of prothymosin α1 (Pro α1) in combination with interleukin-2 (IL-2) on peripheral blood lymphocytes from 50 colorectal tumor patients at different stages were studied with respect to immunocytotoxicity, adhesion to cultured SW620 colon carcinoma cells, secretion of cytokines and expression of adhesion and surface marker molecules. On average, the patients showed lower natural killer (NK) cell activity than healthy donors, which was associated with a lower adhesion capacity to the tumor target cells. The NK cell activity of the patients was inversely related to the tumor stage. The generation of lymphokine(IL-2)-activated killer (LAK) cell activity was found to be comparable on lymphocytes from healthy individuals and patients and was not correlated to tumor stage. Pro α1 stimulated patients' LAK cell activity only, primarily at the early stage (Dukes A/B). The Pro α1 effect was associated with an increased adhesion of lymphocytes to tumor target cells and an increased secretion of the deficient IL-2-induced IFNγ secretion. No significant effects on the low level of TNFα secretion was noted. By flow cytometry, Pro α1 in combination with IL-2 augmented the expression of the NK cell markers CD56, CD16/56, the subset CD3/16/56 and CD25 on lymphocytes of the patients. In contrast, Pro α1 was equally effective by increasing the expression of CD18 and CD11a on lymphocytes from the patients and from normal controls. In conclusion, Pro α1, in combination with IL-2, can partially normalize lymphocyte deficiencies of colon cancer patients in vitro. This potential might provide an experimental basis for applying Pro α1 or related thymic peptides in selected immunotherapies against colorectal tumors.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1432-0584
    Keywords: Key words Mucor pneumonia ; Lymphoma ; 2-Chlorodeoxyadenosine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Fungal infections, in addition to bacterial and opportunistic infections such as Pneumocystis carinii pneumonia, may evolve in patients with infectious complications due to iatrogenic immunosuppression. Aside from common Candida and Aspergillus species, rare fungi like Mucor must be considered in patients with neutropenia or prolonged impaired T-cell function. Here we report on a patient with a low grade lymphoma who was treated with 2-chlorodeoxyadenosine because of disease progression. After recovery from Pneumocystis carinii pneumonia he presented again with clinical signs of pneumonia. No pathogen was found on bronchoscopy and he died rapidly. In the lungs a massive necrosis was seen in which nonseptated hyphae identified as Mucor species were demonstrated.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 1433-0415
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Aufgrund der unüberschaubaren Fülle von Phase-I, -II und -III Studien bei Patienten mit metastasiertem kolorektalem Karzinom, der starken Variabilität der Applikation von 5-Fluorouracil und der biochemischen Modulatoren, des Wandels der Therapieendpunkte sowie aufgrund des hohen Budgetdrucks im Gesundheitswesen soll versucht werden, mit Hilfe der Erkenntnisse der Evidenz-basierten Medizin Standards in der systemischen Chemotherapie zu formulieren.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 1432-1440
    Keywords: Germ cell tumors ; Gonadal toxicity ; Chemotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The impact of aggressive chemotherapy on reproductive and endocrine gonadal function was prospectively studied in 44 patients with germ cell tumors. Diagnostic procedures to determine gonadal toxicity consisted of hormone determinations, semen analyses, interviews with a standardized questionnaire, and gonadal histology. After chemotherapy all patients showed elevated serum levels of follicle-stimulating hormone (FSH) and azoospermia due to germ cell and stem cell loss. Recovery of spermatogenesis, as indicated by normalization of serum FSH levels and sperm density, occurred in 77% of the patients 25–60 months after cessation of chemotherapy. In all patients serum testosterone and luteinizing hormone (LH) values remained within normal limits after therapy indicating resistance of Leydig cells to cytotoxic drugs. Three patients fathered four healthy children after completion of chemotherapy. These data suggest significant reproductive dysfunction in all men treated for germ cell tumors. However, most patients showed late and complete recovery of spermatogenesis. In contrast, endocrine gonadal function was unaffected after chemotherapy in all patients. FSH and LH are feasible markers to assess drug-induced gonadal toxicity.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1432-1335
    Keywords: Gonadal toxicity ; Hodgkin's disease ; COPP chemotherapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Testicular and ovarian functions were assessed in 33 patients with Hodgkin's disease 1 to 17 years after cessation of COPP chemotherapy with cyclophosphamide, vincristine, procarbazine, prednisone. Diagnostic procedures consisted of hormone measurements, interviews, and semen analyses. In women serum levels of follicle-stimulating hormone (FSH), luteinizing hormone (LH), 17β-estradiol, progesterone, prolactin, and in men FSH, LH, 17β-estradiol, testosterone, and prolactin were determined. Semen analyses were performed in all men. Information concerning pregnancies, pregnancy outcome, future fertility wishes, sexual functions, menstrual pattern, and incidence of premature menopausal symptoms was ascertained by interview and questionnaire. Nineteen of 19 (100%) men showed elevated serum FSH levels between 715 and 1910 (median 1095) ng/ml and azoospermia, 1 to 11 years afters therapy. Serum levels of testosterone were within normal limits in 18/19 (95%) of the men, and LH values were normal in all men. Permanent ovarian failure occurred in 8/14 (57%) women, causing infertility and premature menopausal symptoms. The incidence of ovarian failure in women over 24 years was 86% (6/7) versus 28% (2/7) in those under 24 years at the time of treatment. In women receiving estrogen replacement, incidence and severity of these symptoms were significantly reduced. Of 14 women 3(21%) became pregnant and delivered 5 healthy children after treatment. Our results suggest irreversible sterility and normal Leydig cell function after COPP chemotherapy in all men. Druginduced ovarian failure was age-related and caused premature menopausal symptoms, detracting from the quality of the patient's life. To reduce premature menopausal symptoms and to prevent adverse cardiovascular and metabolic late sequelae, hormonal replacement is indicated. Pregnancies ending in normal live births can be achieved after COPP chemotherapy in young women. In both men and women, serum FSH and LH levels proved to be feasible markers to determine degree and duration of endocrine and reproductive gonadal injury after chemotherapy.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1432-1335
    Keywords: Colorectal cancer ; LAK cell activity ; Prothymosin α1 ; Cytokines ; Adhesion molecules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effects of prothymosin α1 (Pro α1) in combination with interleukin-2 (IL-2) on peripheral blood lymphocytes from 50 colorectal tumor patients at different stages were studied with respect to immunocytotoxicity, adhesion to cultured SW620 colon carcinoma cells, secretion of cytokines and expression of adhesion and surface marker molecules. On average, the patients showed lower natural killer (NK) cell activity than healthy donors, which was associated with a lower adhesion capacity to the tumor target cells. The NK cell activity of the patients was inversely related to the tumor stage. The generation of lymphokine(IL-2)-activated killer (LAK) cell activity was found to be comparable on lymphocytes from healthy individuals and patients and was not correlated to tumor stage. Pro α1 stimulated patients' LAK cell activity only, primarily at the early stage (Dukes A/B). The Pro α1 effect was associated with an increased adhesion of lymphocytes to tumor target cells and an increased secretion of the deficient IL-2-induced IFNγ secretion. No significant effects on the low level of TNFα secretion was noted. By flow cytometry, Pro α1 in combination with IL-2 augmented the expression of the NK cell markers CD56, CD16/56, the subset CD3/16/56 and CD25 on lymphocytes of the patients. In contrast, Pro α1 was equally effective by increasing the expression of CD18 and CD11a, on lymphocytes from the patients and from normal controls. In conclusion, Pro α1, in combination with IL-2, can partially normalize lymphocyte deficiencies of colon cancer patients in vitro. This potential might provide an experimental basis for applying Pro α1 or related thymic peptides in selected immunotherapies against colorectal tumors.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1432-1440
    Keywords: Adhesion receptors ; Gastrointestinal Tumors ; Integrins ; Cadherins ; CD44
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Changes in the expression and function of adhesion molecules on the surface of cancer cells are important characteristics in the development of gastrointestinal malignancies and might be used in the future as prognostic factors or as new targets for diagnostic and therapeutic approaches. In esophageal cancer a down-regulation of the E-cadherin receptor and the cytoplasmic protein α-catenin is associated with tumor dedifferentiation, infiltrative growth and lymph-node metastasis. In gastric cancer a reduction of E-cadherin expression due to gene mutations is restricted to diffuse-type tumors while the occurrence of the CD44-standard and the CD44-9v isoform is significantly related to a higher tumor-induced mortality and a shorter survival time. The CD44-6v isoform is predominantly expressed by intestinal-type gastric carcinomas, giving these tumor cells the ability to perform lymph-node metastasis. In pancreatic cancer the expression of integrin adhesion receptors is significantly altered during the malignant transformation while a loss of the E-cadherin receptor can generate dedifferentiation and invasiveness of pancreas carcinoma cells. There is increasing evidence that integrin receptors as well as different isoforms of the CD44 receptor are altered following the malignant transformation of colonic mucosa into adenomas and invasive carcinomas. The expression of the CD44-6v isoform seems to be associated with an adverse prognosis in colorectal cancer due to the development of tumor metastases. A strong correlation has been observed between the expression of the 67-kDa laminin receptor and the degree of differentiation, the invasive phenotype and the metastatic abilities af colorectal cancer cells. Analyzing the expression of the E-cadherin receptor showed that this receptor may serve as an independent prognostic marker in Dukes' stage B colorectal cancer to identify patients with poor prognosis and designate them for intensive adjuvant therapy and clinical observation after curative surgical tumor treatment.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...