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  • ARDS  (1)
  • Apoptosis  (1)
  • Chemotherapy Melatonin  (1)
  • 1
    ISSN: 1433-2981
    Schlagwort(e): Apoptosis ; Blood cells ; Hepatic haemopoiesis ; Hibernation ; Urodeles
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Morphocytochemical correlation between proliferation (BrdU uptake) of the haemopoietic liver subcapsular tissue and peripheral blood cell characteristics was performed during active (summer) and hibernating (winter) periods in two Urodele species: Triturus carnifex and Triturus alpestris. The significant decrease of the haemopoietic cell proliferation during the hibernation was accompanied by some modifications both at erythrocyte and leucocyte level. This situation was primarily characterised by a hypofunctionality and ageing of these cells with the disappearance of immature elements from the circulation and cell loss by apoptotic mechanisms. The results indicate that the condition of low metabolism during the winter period in these Urodeles involved deep changes in the physiology of haemopoietic tissue and blood circulating cells.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1433-7339
    Schlagwort(e): Chemotherapy Melatonin ; Myelosuppression ; Toxicity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Experimental data have suggested that the pineal hormone melatonin (MLT) may counteract chemotherapy-induced myelosuppression and immunosuppression. In addition, MLT has been shown to inhibit the production of free radicals, which play a part in mediating the toxicity of chemotherapy. A study was therefore performed in an attempt to evaluate the influence of MLT on chemotherapy toxicity. The study involved 80 patients with metastatic solid tumors who were in poor clinical condition (lung cancer: 35; breast cancer: 31; gastrointestinal tract tumors: 14). Lung cancer patients were treated with cisplatin and etoposide, breast cancer patients with mitoxantrone, and gastrointestinal tract tumor patients with 5-fluorouracil plus folates. Patients were randomised to receive chemotherapy alone or chemotherapy plus MLT (20 mg/day p.o. in the evening). Thrombocytopenia was significantly less frequent in patients concomitantly treated with MLT. Malaise and asthenia were also significantly less frequent in patients receiving MLT. Finally, stomatitis and neuropathy were less frequent in the MLT group, albeit without statistically significant differences. Alopecia and vomiting were not influenced by MLT. This pilot study seems to suggest that the concomitant administration of the pineal hormone MLT during chemotherapy may prevent some chemotherapy-induced side-effects, particularly myelosuppression and neuropathy. Evaluation of the impact of MLT on chemotherapy efficacy will be the aim of future clinical investigations.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 1433-7339
    Schlagwort(e): ARDS ; Quality of life ; Tumour necrosis factor ; Pentoxiphylline
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The inappropriate endogenous secretion of tumour necrosis factor (TNF) could play a role in the pathogenesis of acute respiratory distress syndrome (ARDS), one of the most frequent causes of death in cancer patients. Because of its capacity to inhibit TNF secretion in vitro, pentoxifylline (PTX) could be extremely useful in ARDS therapy. In this study 30 advanced cancer patients with ARDS were randomized to receive either the conventional care or conventional care plus PTX (100 mg i.v. twice a day for 7 days followed by an oral administration of 400 mg three times a day) to evaluate the efficacy of PTX in reducing TNF serum levels and in improving the symptoms of this syndrome. Serum levels of TNF were measured before and after 7 days of therapy. The percentage of patients alive at 7 days was significantly higher in the PTX-treated group than in the controls (12/15 versus 3/15; P〈0.001). The mean survival time was significantly higher in the PTX-treated group than in the controls. A clinical and/or radiological improvement was obtained in 11/15 patients treated with PTX and in only 2/15 patients in the conventional care group (P〈0.01). TNF mean levels significantly decrease in the PTX-treated group. These data confirm in vivo the capacity of PTX to inhibit TNF secretion in patients with ARDS. Moreover PTX therapy may improve the symptoms related to ARDS without particular toxic effects.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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