Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0029463 (osteosarcoma)
 16,637 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

In order to evaluate and modify the radiosensitizing effect of carboplatin, amphotericin B (AmB) was given as pre-treatment to nude mice with bilateral subcutaneous human osteosarcoma xenografts. One of the two tumours in each animal was irradiated with a single dose of 12 Gy following treatment with AmB (5 mg kg(-1)), or carboplatin (20 mg kg(-1)), or AmB (5 mg kg(-1)) plus carboplatin (20 mg kg(-1)), respectively. Tumour growth was compared with non-treated tumours. A significant reduction of tumour growth was observed after irradiation. Carboplatin in itself reduced tumour growth and also added to the effect of radiation. An unexpected interaction was seen where AmB obviously decreased the effect of either carboplatin or radiation alone or the two given concomitantly. The presented results are contradictory to some earlier in vitro studies and imply that the interactive effect in general and especially with regard to AmB can not be universally applied to all experimental situations.
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PMID:Interaction between amphotericin B, carboplatin, and radiation in human osteosarcoma xenografts in nude mice. 2159 21

Geopropolis is produced by indigenous stingless bees from the resinous material of plants, adding soil or clay. Its biological properties have not been investigated, such as propolis, and herein its cytotoxic action on canine osteosarcoma (OSA) cells was evaluated. OSA is a primary bone neoplasm diagnosed in dogs being an excellent model in vivo to study human OSA. spOS-2 primary cultures were isolated from the tumor of a dog with osteosarcoma and incubated with geopropolis, 70% ethanol (geopropolis solvent), and carboplatin after 6, 24, 48, and 72 hours. Cell viability was analyzed by the crystal violet method. Geopropolis was efficient against canine OSA cells in a dose- and time-dependent way, leading to a distinct morphology compared to control. Geopropolis cytotoxic action was exclusively due to its constituents since 70% ethanol (its solvent) had no effect on cell viability. Carboplatin had no effect on OSA cells. Geopropolis exerted a cytotoxic effect on canine osteosarcoma, and its introduction as a possible therapeutic agent in vivo could be investigated, providing a new contribution to OSA treatment.
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PMID:Anticancer effects of geopropolis produced by stingless bees on canine osteosarcoma cells in vitro. 2369 Aug 51

An 8 yr old castrated male Labrador retriever mixed-breed dog with osteosarcoma (OSA) of the left proximal humerus receiving carboplatin presented 10 days after the third chemotherapy treatment with hematuria, stranguria, and pollakiuria. A presumptive diagnosis of hemorrhagic cystitis was made based on clinical signs, urinalysis, and cytologic analysis of a traumatic catheterization sample. Carboplatin was removed from the chemotherapy treatment plan and was substituted with doxorubicin. The dog was treated with meloxicam for pain, and the cystitis signs subsided over a period of 4 wk. Carboplatin is commonly used as adjuvant chemotherapy for dogs with OSA following amputation and is not known to cause hematuria in dogs, although there are reports of this occurring in humans. To the authors' knowledge, there are no reports in the veterinary literature of this toxicity.
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PMID:Hemorrhagic cystitis in a dog receiving carboplatin. 2421 93


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