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 (ăk-tĭn′ō-mī′sĭn, ăk′tə-nō-)
Any of a class of peptide-containing, often toxic antibiotics that are obtained from soil bacteria.


(Pharmacology) any of several toxic antibiotics obtained from bacteria of the genus Streptomyces, used in treating some cancers; the most commonly used is dactinomycin (actinomycin D)


(ækˌtɪn oʊˈmaɪ sɪn, ˌæk tə noʊ-)

any of a group of related antibiotics derived from streptomyces bacteria, used in the treatment of various cancers.
[1935–1940; actinomyc (es) + -in1]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.actinomycin - any of various red antibiotics isolated from soil bacteria
antibiotic, antibiotic drug - a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections; "when antibiotics were first discovered they were called wonder drugs"
References in periodicals archive ?
Dactinomycin is an actinomycin indicated for the treatment of: adult and pediatric patients with Wilms tumor, as part of a multi-phase, combination chemotherapy regimen.
Porcine pancreatic elastase type IV, N-succinyl-(Ala)3-pnitroanilide, Trizma base, XTT cell proliferation kit II, L-ascorbic acid, and Actinomycin D were obtained from Sigma Aldrich, MO, USA.
(4) Examples of antibiotics from Actinobacteria include streptomycin, streptothricin, and actinomycin. (4,6) In addition to their antimicrobial activity, previous research indicated that Actinobacteria are a good source of promising compounds with herbicidal, antitumor, antifungal and anthelminthic activities.
All patients followed UKCCLG (United Kingdom Children Cancer and Leukemia Group) protocol for therapy.Two-drug preoperative chemotherapy with Vincristine and Actinomycin was used in non-metastatic tumour for 4 cycles and Doxorubicin added for metastatic tumours and total duration of preoperative chemotherapy was increased to 6 cycles.
After Pre-Chemotherapy Workup, Multidrug Chemotherapy (Etoposide, Methotrexate, Actinomycin - D, Cyclo-phosphamide, Oncovin / Vincristine) was started and the patient was regularly monitored by CBCs, LFTs, RFTs and Serum [beta] HCG.
[10] Chemotherapeutic agents used in the treatment of STS are bleomycin, 5-fluorouracil, methotrexate, vincristine, actinomycin, doxorubicin, cyclophosphamide, or dacarbazine.
We describe a case of a patient who continued to progress during treatments with carboplatin, paclitaxel, melphalan, actinomycin D, and radiotherapy but achieved 18 months of progression free survival (PFS) and an improved quality of life with oral capecitabine despite her diffusely metastatic disease.
After the definitive histological diagnosis and multidisciplinary evaluation, the oncologist proposed an adjuvant therapy of six cycles with vincristine, actinomycin D, and cyclophosphamide, which was accepted by the patient.
In some of the experiments, the HUVECs were stimulated by a transcription inhibitor, actinomycin D (5 [micro]g/ml), before [H.sub.2][] treatment and harvested after a certain time.
One such colored compound is actinomycin which are bicyclic chromopeptide lactone antineoplastic antibiotics produced by various Streptomycetes.
Subsequently, by using bovine thyroid cells, Knopp and co-workers confirmed this observation (1970) as well as an inhibitory effect of actinomycin D when added together with TSH.