Actinomycin

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Actinomycin
File:Actinomycin.png
Clinical data
ATC code
Pharmacokinetic data
Protein binding5%
Elimination half-life36 hours
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PubChem CID
DrugBank
E number{{#property:P628}}
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Chemical and physical data
FormulaC62H86N12O16
Molar mass1255.42 g/mol

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Actinomycin is any of a class of polypeptide antibiotics isolated from soil bacteria of the genus Streptomyces.

Mechanism

Actinomycin-D is primarily used as an investigative tool in cell biology to inhibit transcription. It does this by binding DNA at the transcription initiation complex and preventing elongation by RNA polymerase.[1]

As it can bind DNA duplexes, it can also interfere with DNA replication, although other chemicals such as hydroxyurea are better suited for use in the laboratory as inhibitors of DNA synthesis.

Clinical use

As chemotherapy

Actinomycin-D is marketed under the trade name Dactinomycin. Actinomycin-D is one of the older chemotherapy drugs which has been used in therapy for many years.

It is a clear, yellow liquid which is administered intravenously and most commonly used in treatment of a variety of cancers, including:

As an antibiotic

It was the first antibiotic shown to have anti-cancer activity, but is not normally used as such, as it is highly toxic, causing damage to genetic material.

It was the first antibiotic ever isolated by Selman Waksman.

Research use

Actinomycin-D and its fluorescent derivative, 7-amino-actinomycin D, are used as stains in microscopy and flow cytometry applications. The affinity of these stains compounds for GC-rich regions of DNA strands makes them excellent markers for DNA.

7-amino-actinomycin D (7aad) is used as a DNA stain .7aad binds to single stranded DNA. Therefore it is a useful tool in determining apoptosis and distinguishing between dead cells and live ones. (Source)

References

  1. Sobell H (1985). "Actinomycin and DNA transcription". Proc Natl Acad Sci U S A. 82 (16): 5328–31. PMID 2410919.
  2. Turan T, Karacay O, Tulunay G, Boran N, Koc S, Bozok S, Kose M. "Results with EMA/CO (etoposide, methotrexate, actinomycin D, cyclophosphamide, vincristine) chemotherapy in gestational trophoblastic neoplasia". Int J Gynecol Cancer. 16 (3): 1432–8. PMID 16803542.
  3. Abd El-Aal H, Habib E, Mishrif M (2005). "Wilms' Tumor: The Experience of the Pediatric Unit of Kasr El-Aini Center of Radiation Oncology and Nuclear Medicine (NEMROCK)". J Egypt Natl Canc Inst. 17 (4): 308–11. PMID 17102824.
  4. Khatua S, Nair C, Ghosh K (2004). "Immune-mediated thrombocytopenia following dactinomycin therapy in a child with alveolar rhabdomyosarcoma: the unresolved issues". J Pediatr Hematol Oncol. 26 (11): 777–9. PMID 15543019.

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de:Actinomycine ko:악티노마이신


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