Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C1261473 (sarcoma)
 25,952 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The prognosis of rhabdomyosarcoma (RMS) in advanced stages is still sobering. Therapy is limited due to local tumor recurrence, development of metastases and multidrug resistance. The aim of this study was to investigate the development of multidrug resistance in cell lines and in xenografts of alveolar and embryonal RMS treated according to the German Soft Tissue Sarcoma Study (CWS). Alveolar and embryonal RMS cell lines were treated with Vincristine, Topotecan, Carboplatin, Actinomycin D, or Ifosfamide. Expression levels of resistance-associated genes were assessed using Real time-PCR. Nude mice (NMRI nu/nu, n = 10 per group) underwent xenotransplantation of human embryonal or alveolar RMS. Animals were treated with standard chemotherapeutic drugs Vincristine, Topotecan, Carboplatin, Actinomycin D, or Ifosfamide according to treatment schedules of the CWS-study. Tumor sizes were measured and relative tumor volumes were calculated. Animals were sacrificed after 20 days and standard histology, Real-time-PCR for MDR1-, MRP-, LRP- and MDM2-gene as well as immunohistochemistry for MDR1-, LRP-, and MRP-protein were performed. In the cell lines, an up-regulation of MDR-1 gene was found in alveolar rhabdomyosarcoma. In embryonal rhabdomyosarcoma, an up-regulation of LRP and MRP was found. Standard chemotherapy of alveolar rhabdomyosarcoma resulted in a significant reduction of tumor growth (P < 0.05) in all groups. In embryonal rhabdomyosarcoma strongest effects were found after treatment with Ifosfamide, Vincristine and Carboplatin (P < 0.05). RT-PCR revealed a MDR1-dependent mechanism in alveolar rhabdomyosarcoma. In embryonal rhabdomyosarcoma, MDR1 occurred to a lower degree. Immunohistochemistry revealed correlating expression levels of multidrug resistance-associated proteins. The use of established chemotherapy on human RMS in vivo had strong effects on xenografts compared to their controls. In all cases, there was only a reduction of tumor growth, but not a complete eradication of the tumors. Chemotherapy seemed to upregulate the expression of resistance-associated genes in vitro and in vivo. The mechanism of multidrug resistance depends on the tumor subtype. Therefore, further investigations will be required to evaluate multidrug resistance in patients and to investigate new modalities for a reversal of multidrug resistance.
 ...
PMID:Effects of standard chemotherapy on tumor growth and regulation of multidrug resistance genes and proteins in childhood rhabdomyosarcoma. 1721 91

Purpose. Ifosfamide is a drug commonly used in the management of sarcomas and other solid tumours. One potential toxicity of its use is renal tubular damage, which can lead to skeletal abnormalities; rickets in children and osteomalacia in adults. We aimed to characterise this rare complication in adults. Patients. Three illustrative patient cases treated in our institution are presented. All were treated for sarcoma, and received varying doses of ifosfamide during their therapy. Methods. We performed a review of the literature on the renal tubular and skeletal complications of ifosfamide in adults. Papers were identified by searches of PubMed using the terms "osteomalacia," "nephrotoxicity," "Fanconi syndrome," "ifosfamide," and "chemotherapy" for articles published between 1970 and 2006. Additional papers were identified from review of references of relevant articles. Results. There are only four case reports of skeletal toxicity secondary to ifosfamide in adults; the majority of data refer to children. Risk factors for development of renal tubular dysfunction and osteodystrophy include platinum chemotherapy, increasing cumulative ifosfamide dose, and reduced nephron mass. The natural history of ifosfamide-induced renal damage is variable, dysfunction may not become apparent until some months after treatment, and may improve or worsen with time. Discussion. Ifosfamide-induced osteomalacia is seldom described in adults. Clinicians should be vigilant for its development, as timely intervention may minimise complications.
Sarcoma 2007
PMID:Osteomalacia as a late metabolic complication of Ifosfamide chemotherapy in young adults: illustrative cases and review of the literature. 1764 45

Ifosfamide (IFOS) is a bifunctional alkylator with a wide spectrum of activity in solid tumors and has an autoinductive liver metabolism through P450 cytochromes. Autoinduction might permit a better therapeutic index for combination therapy. A phase I trial was investigated with interpatient dose escalation of a single dose of IFOS given every 2 weeks in advanced solid tumor patients. IFOS, its dechloroethylated and active 4-hydroxy metabolites, were measured at cycles 1 and 2 at the end of infusion, 2 and 5 h later, using gas chromatography. IFOS elimination was considered as following monocompartimental model kinetics. The results of 20 patients from January 2004 to June 2006 were included. The median of previous chemotherapies was 2 (0-5). The primary tumor was most often ovarian (5), peritoneal (3), sarcoma (2), melanoma (2) or miscellaneous (8). Ten patients received 2.5 g/m2 and the other 10 patients received 3 g/m2. A total of 79 cycles were evaluable for toxicity. The median number of cycles was 4 (1-8). No grade 3-4 toxicity, no alopecia at first dose level and no toxicity-related fatal events were noted. One objective response was noted in a pancreatic cancer patient and one sustained CA125 decline in a heavily pretreated ovarian cancer patient. A slight (7-10%) but reproducible decrease of areas under the curve was detectable at cycle 2, at both dose levels, related to autoinductive metabolism. Intraindividual variations (large SD) were noticed for each pharmacokinetic parameter. A patient-dependent autoinduction of IFOS metabolism was detected rather than a slight nondose-dependent autoinduction. The toxicity profile allows the development of bi-weekly IFOS-based combination therapies.
 ...
PMID:An original administration of ifosfamide given once every other week: a clinical and pharmacological study. 1851 Jan 76

Background. Although the survival of children with soft tissue sarcoma (STS) has improved considerably, the outcome of patients with metastatic disease, and those with primary tumours of the extremities or parameningeal sites remains disappointing. We describe the clinical outcome of an ifosfamide-based regimen with local therapy directed only to children who failed to achieve a complete response to initial chemotherapy.Patients and Methods. Twenty-one children with STS (16 rhabdomyosarcoma) who presented with unresectable tumours were treated with five courses of ifosfamide (9 g/m(2)) and etoposide (600 mgm(2)). Patients who did not achieve a complete response then received local therapy. Chemotherapy with ifosfamide combined with etoposide, vincristine (1.5 mg/m(2) and doxorubicin (60 mg/m(2)) or vincristine and actinomycin D (1.5 mg/m(2)) was continued for one year.Results and Discussion. Objective responses to five courses of ifosfamide and etoposide were seen in all patients. Disease free survival (DFS) at a median follow up of 59 months was 57% (95% CI 29-75%). The DFS of children who received local therapy was 89% compared with 33% in those who received chemotherapy alone (p=0.027). Locoregional recurrences did not occur in children who received radiotherapy to the site of the primary tumour. Ifosfamide-based chemotherapy does not reduce the incidence of loco-regional recurrence in children who do not receive local therapy.
Sarcoma 1998
PMID:Outcome and toxicity of an Ifosfamide-based soft tissue sarcoma treatment protocol in children. The importance of local therapy. 1852 Dec 50

Purpose. To define the maximally tolerated dose (MTD) of ifosfamide when given with G-CSF on an every other week schedule, and to define the MTD of edatrexate that can be given every two weeks with an intense schedule of ifosfamide.Patients and Methods. Forty-one patients with metastatic or unresectable, locally advanced sarcoma participated in this 2-step phase I trial.The starting dose of ifosfamide was 10 gm/m(2) given by continuous intravenous infusion over 4 days every 2 weeks.When the MTD was defined, edatrexate, beginning at a dose of 40 mg/m(2) intravenously every 2 weeks was added in subsequent cohorts of patients.Results. Myelosuppression was the most prominent toxicity. Fatigue, nausea, and vomiting were observed in the majority of patients. Ifosfamide 12 gm/m(2) given every 2 weeks approached or exceeded the MTD. Edatrexate 100 mg/m(2) could be given safety as an intravenous bolus with ifosfamide 10 gm/m(2) every 2 weeks. Therapeutic responses were observed in patients with measurable disease.Conclusions. This study demonstrates the feasibility of administering a dose-intense schedule of ifosfamide alone or ifosfamide with edatrexate that might be applied in the adjuvant or neo-adjuvant setting.
Sarcoma 1999
PMID:Evaluation of dose-intense Ifosfamide, with and without edatrexate, in adults with sarcoma. 1852 Dec 74

Neurotoxicity is a clinically relevant adverse event observed with the use of ifosfamide. It is usually mild, occasionally severe and seldom fatal. Ifosfamide-induced encephalopathy requires interruption of chemotherapy, intravenous hydration and administration of methylene blue. Less is known about the efficacy of methylene blue in avoiding a second episode of ifosfamide-induced encephalopathy while maintaining chemotherapy with ifosfamide. We report a case of a different clinical manifestation of ifosfamide-induced encephalopathy after continued ifosfamide use and despite methylene blue in a patient with retroperitoneal sarcoma.
 ...
PMID:Ifosfamide encephalopathy and use of methylene blue. A case report of different sequential neurotoxicity. 1985 74

Ifosfamide is a chemotherapeutic prodrug used in the treatment of several tumor entities, including bone and soft-tissue sarcoma. However, the application of high-dose ifosfamide is not feasible because of severe side effects caused by metabolites. The active metabolite isophosphoramide mustard is not suitable for administration because of chemical instability. ZIOPHARM Oncology Inc, under license from Dekk-Tec Inc, is developing palifosfamide, a formulation of isophosphoramide mustard with tris(hydroxymethyl)aminomethane salt-stabilization (palifosfamide-tris) and previously with lysine-stabilization (palifosfamide-lys). Preclinical studies and phase I and I/II clinical trials demonstrated that palifosfamide-tris had an antitumor efficiency comparable or superior to that of ifosfamide. Patients treated with palifosfamide-tris did not display any of the neurotoxic or nephrotoxic side effects associated with ifosfamide. At the time of publication, data from phase II trials were being evaluated and phase III trials were being planned. palifosfamide-tris is expected to be a safer and less toxic alternative to ifosfamide; however, considering other new approaches under investigation for tumors such as sarcoma, such as molecular-based treatment strategies, it is unclear what position palifosfamide-tris might occupy on the market.
 ...
PMID:Palifosfamide, a bifunctional alkylator for the treatment of sarcomas. 2002 46

Background. Pharmacokinetic data on clearance of ifosfamide in hemodialysis patients are limited. Consequently, these patients are excluded from therapy with this agent. We review the outcomes for patients at our institution with end stage renal disease on dialysis who received ifosfamide for metastatic sarcoma. Patients and Methods. We treated three patients with end stage renal disease on hemodialysis with escalating doses of ifosfamide. Data on radiographic response to therapy, WBC and platelet counts, signs or symptoms of infection, neuropathy and bladder toxicity are reported. Starting doses of ifosfamide were based on review of the literature available with subsequent modifications based on each patient's prior exposure to myelosuppressive agents and on symptoms of neurotoxicity and the degree of myelosuppression following each cycle of chemotherapy. Results. Myelosuppression was the most common side effect from therapy, but no patient developed a life threatening infection, neurotoxicity, or hematuria. One patient developed epistaxis in the setting of thrombocytopenia while on warfarin therapy. All patients had clinical evidence for therapeutic response and two had documented radiographic improvement following ifosfamide administration. Conclusion. Ifosfamide can be used safely in combination with hemodialysis in patients with end stage renal disease.
Sarcoma 2009
PMID:Ifosfamide may be safely used in patients with end stage renal disease on hemodialysis. 2010 95

Doxorubicin monotherapy is the standard first-line treatment in patients with advanced soft-tissue sarcomas. Ifosfamide still remains the standard 2nd line treatment after doxorubicin-failure. However, recent data have demonstrated that histological subtypes differ in their sensitivity to cytotoxic drugs. Therefore, gemcitabine should be considered as the best option after doxorubicin failure in leiomyosarcoma patients. Trabectedine should be used preferentially in myxoid liposarcomas and leiomyosarcomas patients whereas paclitaxel should be considered as a first or second-line treatment of choice in angiosarcoma patients. Further studies are needed in order to identify predictive factors of clinical benefit in advanced soft-tissue sarcoma patients treated with cytotoxic agents in combination or not with targeted therapies.
 ...
PMID:[Chemotherapy options for patients with advanced soft-tissue sarcoma beyond anthracyclines]. 2048 8

These guidelines were drawn up following a consensus meeting of UK sarcoma specialists convened under the auspices of the British Sarcoma Group and are intended to provide a framework for the multidisciplinary care of patients with soft tissue sarcomas. The guidelines published by the European Society of Medical Oncology (ESMO) and the National Comprehensive Cancer Network (NCCN) were used as the basis for discussion and adapted according to UK clinical practice and local requirements. Note was also taken of the National Institute for Health and Clinical Excellence (NICE) improving outcomes guidance (IOG) for people with sarcoma and existing technology appraisals. The guidelines are not intended to challenge NICE guidance but discrepancies may exist where current guidance does not reflect an international standard of care owing to the ever-evolving nature of cancer treatment. It is acknowledged that these guidelines will require updating on a regular basis. An appendix lists the key recommendations which are summarised below. Any patient with a suspected soft tissue sarcoma should be referred to a diagnostic centre and managed by a specialist sarcoma multidisciplinary team. Surgical excision followed by post operative radiotherapy is the standard management of high grade limb sarcomas although occasionally amputation remains the only option. Pre-operative treatment with chemotherapy or radiotherapy should be considered for patients with borderline resectable tumours. Isolated limb perfusion may permit limb salvage in some cases where amputation is the only other option. Adjuvant chemotherapy is not routinely recommended but may be considered in certain specific situations. Regular follow up is recommended to assess local control and the development of metastatic disease. Single agent doxorubicin is the standard first line therapy for metastatic disease. Ifosfamide is an alternative if anthracyclines are contraindicated. Combination therapy may be considered in individual patients. Second line agents include ifosfamide, dacarbazine, trabectedin and the combination of gemcitabine + docetaxel. Surgical resection of local recurrence and pulmonary metastases should be considered in individual patients. There is specific guidance on the management of retroperitoneal and uterine sarcomas.
Sarcoma 2010
PMID:Guidelines for the management of soft tissue sarcomas. 2063 33


<< Previous 1 2 3 4 5 6 Next >>