Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Doxorubicin shopping experience:

1. Compare - without doubt the biggest advantage that the Doxorubicin offers shoppers today is the ability to compare thousands of Doxorubicin at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.

2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about

3. Testimonials - don't know anybody that has bought a Doxorubicin? Wrong! If the Doxorubicin is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.

4. Questions - Got a question about Doxorubicin then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Doxorubicin? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Doxorubicin and build up a picture of their reputation for sales, returns, customer service, delivery etc.

6. Returns - still worried that even after all of the above your Doxorubicin wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.

7. Feedback - happy with your Doxorubicin then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.

8. Security - check for the yellow padlock on the Doxorubicin site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Doxorubicin, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Doxorubicin, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.

{{Drugbox| IUPAC_name = (8S,10S)-10-(4-amino-5-hydroxy-6-methyl-tetrahydro-2H-pyran-2-yloxy)-6,8,11-trihydroxy-8-(2-hydroxyacetyl)-1-methoxy-7,8,9,10-tetrahydrotetracene-5,12-dione| image = Doxorubicin.svg| image2=Doxorubicin-3d-sticks.png| CAS_number = 23214-92-8| ATC_prefix = L01| ATC_suffix =DB01| PubChem = 31703| DrugBank = APRD00185| chemical_formula =| C = 27 |H = 29 |N = 1 |O = 11| molecular_weight = 543.52 Gram/Mole (unit)| bioavailability = 5% (Oral)| protein_bound =| metabolism = CYP3A4, [2005. Vol. 11 (19). Retrieved on April 19, 2007.]-->Doxorubicin' (trade name Adriamycin) or hydroxyldaunorubicin is a DNA-interacting pharmaceutical widely used in chemotherapy. It is an anthracycline antibiotic and structurely closely related to daunomycin, and also intercalation (chemistry) DNA. It is commonly used in the treatment of a wide range of cancers.

The drug is administered by injection, and may be sold under the brand names Adriamycin PFS, Adriamycin RDF, or Rubex." Doxorubicin (Systemic)." Mayo Clinic. Last updated on: June 15, 1999. Retrieved on April 19, 2007. Doxil is a liposome-encapsulated dosage form of doxorubicin made by Ben Venue Laboratories for Johnson & Johnson. The main benefits of this form are a reduction in cardiotoxicity.

History The history of doxorubicin can be traced back to the 1950s, when an Italy research company, Farmitalia Research Laboratories, began an organized effort to find anticancer compounds from soil-based microbes. A soil sample was isolated from the area surrounding the Castel del Monte, a 13th century castle. A new strain of Streptomyces which produced a bright red pigment was isolated, and an antibiotic was produced from this bacterium that was found to have good activity against Murinaes. Since a group of France researchers discovered the same compound at about the same time, the two teams named the compound daunorubicin, combining the name List of Illyrian tribes, a pre-Roman tribe that occupied the area of Italy where the compound was isolated, with the French word for ruby, rubis, describing the color.Weiss, Raymond B. "The Anthracyclines: Will We Ever Find a Better Doxorubicin?" Seminars in Oncology. Vol. 19, No. 6. December 1992. pp. 670–686. PMID 1462166. Clinical trials began in the 1960s, and the drug saw success in treating acute leukemia and lymphoma. However, by 1967, it was recognized that daunorubicin could produce fatal cardiac toxicity.Tan, C.; Tasaka, H.; Kou-Ping, Y.; et al. Daunomycin, An Antitumor Antibiotic, In the Treatment of Neoplastic Disease. Clinical Evaluation with Special Reference to Childhood Leukemia. 1967, Cancer, 20, 333 – 353. PMID 4290058.

Researchers at Farmitalia soon discovered that changes in biological activity could be made by minor changes in the structure of the compound. A strain of Streptomyces was mutated using N-nitroso-N-methyl urethane and this new strain produced a different, red-colored antibiotic. They named this new compound Adriamycin, after the Adriatic Sea, and the name was later changed to doxorubicin to conform to the established naming convention.Arcamone, F.; Cassinelli, G.; Fantini, G.; et al. Adriamycin, 14-hydroxydaunomycin, A New Antitumor Antibiotic from S. peucetius var. caesius. 1969, Biotechnol. Bioeng., 11, 1101 – 1110. PMID 5365804. Doxorubicin showed better activity than daunorubicin against murine tumors, and especially solid tumors. It also showed a relatively higher therapeutic index, yet the cardiotoxicity remained.Di Marco, A.; Gaetani, M.; Scarpinato, B. Adriamycin (NSC-123,127): A New Antibiotic with Antitumor Activity. 1969, Cancer Chemotherapy Reports, 53, 33 – 37. PMID 5772652.

Doxorubicin and daunorubicin together can be thought of as prototype compounds for the anthracyclines. Subsequent research by many investigators throughout the world has led to many other anthracycline antibiotics, or analogs, and today, it is estimated that there are over 2,000 known analogs of doxorubicin. By 1991, 553 of them have been evaluated in the screening program at the National Cancer Institute (NCI).

Biosynthesis Doxorubicin (DXR) is a 14-hydroxylated version of daunorubicin, the immediate precursor of DXR in its Biosynthesis pathway. Daunorubicin is more abundantly found as a natural product because it is produced by a number of different wild type Strain (biology)s of streptomyces. In contrast, only one known non-wild type species, streptomyces peucetius subspecies cesius ATCC 27952, was initially found to be capable of producing the more widely used doxorubicin. This strain was created by Arcamone et. al in 1969 by mutation a Strain (biology) producing daunorubicin, but not DXR, at least in detectable quantities. Subsequently, Hutchinson's group showed that under special environmental conditions, or by the introduction of Modifications (genetics), other strains of streptomyces can produce doxorubicin. His group has also cloned many of the genes required for DXR production, although not all of them have been fully characterized. In 1996, Strohl's group discovered, isolated and characterized dox A, the gene encoding the enzyme that converts daunorubicin into DXR. By 1999, they produced recombinant Dox A, a Cytochrome P450 oxidase, and found that it catalyzes multiple steps in DXR biosynthesis, including steps leading to daunorubicin. This was significant because it became clear that all daunorubicin producing strains have the necessary genes to produce DXR, the much more therapeutically important of the two. Hutchinson's group went on to develop methods to improve the yield of DXR, from the Industrial fermentation process used in its commercial production, not only by introducing Dox A encoding plasmids, but also by introducing mutations to deactivate enzymes that shunt DXR precursors to less useful products, for example baumycin-like glycosides. Some triple mutants, that also gene expression Dox A, were able to double the yield of DXR. This is of more than academic interest because at that time DXR cost about $1.37 million per kg and current production in 1999 was 225 kg per annum. More efficient production techniques have brought the price down to $1.1 million per kg for the non-liposomal formulation. Although DXR can be produced semisynthesis from daunorubicin, the process involves electrophilic bromination and multiple steps and the yield is poor. Since daunorubicin is produced by Fermentation (biochemistry), it would be ideal if the bacteria could complete DXR synthesis more effectively.

Mechanism of action The exact mechanism of action of doxorubicin is complex and still somewhat unclear, though it is thought to interact with DNA by intercalation.Fornari, F.A.; Randolph, J.K.; Yalowich, J.C.; Ritke, M.K.; Gewirtz, D.A. Interference by Doxorubicin with DNA Unwinding in MCF-7 Breast Tumor Cells. 1994, Molecular Pharmacology, 45, 649 – 656. PMID 8183243. Doxorubicin is known to interact with DNA by Intercalation (disambiguation) and inhibition of macromolecular biosynthesis.Momparler, R.L.; Karon, M.; Siegel, S.E.; Avila, F. Effect of Adriamycin on DNA, RNA and Protein Synthesis in Cell-Free Systems and Intact Cells. 1976, Cancer Research, 36, 2891 – 2895. PMID 1277199. Free full text This inhibits the progression of the enzyme topoisomerase II, which unwinds DNA for Transcription (genetics). Doxorubicin stabilizes the topoisomerase II complex after it has broken the DNA chain for replication, preventing the DNA double helix from being resealed and thereby stopping the process of DNA replication.

The planar aromatic chromophore portion of the molecule intercalates between two base pairs of the DNA, while the six-membered daunosamine sugar sits in the minor groove and interacts with flanking base pairs immediately adjacent to the intercalation site, as evidenced by several crystal structures.Frederick, C.A.; Williams, L.D.; Ughetto, G.; van der Marel, G.A.; van Boom, J.H.; Rich, A.; Wang, A.H. Structural Comparison of Anticancer Drug-DNA Complexes: Adriamycin and Daunomycin. 1990, Biochemistry, 29, 2538 – 2549. PMID 2334681. Crystal structure is available for download as a PDB file.Pigram, W.J.; Fuller, W.; Hamilton, L.D. Stereochemistry of Intercalation: Interaction of Daunomycin with DNA. 1972, Nature New Biology, 235, 17 – 19. PMID 4502404.

Clinical use Doxorubicin is commonly used to treat some leukemias, Hodgkin's lymphoma, as well as cancers of the bladder cancer, breast cancer, stomach cancer, lung cancer, ovarian cancer, thyroid cancer, soft tissue sarcoma, multiple myeloma, and others. Commonly used doxorubicin-containing chemotherapy regimen are CA (cyclophosphamide, Adriamycin), TAC (Taxotere, CA), ABVD (Adriamycin, Bleomycin, Vinblastine, Dacarbazine), CHOP (Cyclophosphamide, Adriamycin, Vincristine, Prednisone) and FAC (5-Fluorouracil, Adriamycin, Cyclophosphamide). Doxil is used primarily for the treatment of ovarian cancer where the disease has progressed or recurred after platinum-based chemotherapy, or for the treatment of AIDS-related Kaposi's sarcoma." DOXIL Product Information." Ortho Biotech Products, L.P. Retrieved on April 19, 2007.

Experimental therapy Combination therapy experiments with sirolimus (rapamycin) and doxorubicin have shown promise in treating Akt-positive lymphomas in mice.

Recent animal research coupling a Murinae monoclonal antibody with doxorubicin has created an immunoconjugate that was able to eliminate HIV infection in mice. Current treatment with antiretroviral drug (ART) still leaves pockets of HIV within the host. The immunoconjugate could potentially provide a complimentary treatment to ART to eradicate antigen-expressing T cells.

Side effects Acute side-effects of doxorubicin can include nausea, vomiting, and heart arrhythmias. It can also cause neutropenia (a decrease in white blood cells), as well as complete alopecia (hair loss). When the cumulative dose of doxorubicin reaches 550 mg/m², the risks of developing cardiac side effects, including congestive heart failure, dilated cardiomyopathy, and death, dramatically increase. Doxorubicin cardiotoxicity is characterized by a dose-dependent decline in mitochondrial oxidative phosphorylation. Reactive oxygen species, generated by the interaction of doxorubicin with iron, can then damage the myocytes (heart cells), causing myofibrillar loss and cytoplasmic vacuolization. Additionally, some patients may develop Palmar plantar erythrodysesthesia, or, "Hand-Foot Syndrome," characterized by skin eruptions on the palms of the hand or soles of the feet, characterized by swelling, pain and erythema.

Due to these side effects and its red color, doxorubicin has earned the nickname "red devil."

See also

References

External links

{{Drugbox| IUPAC_name = (8S,10S)-10-(4-amino-5-hydroxy-6-methyl-tetrahydro-2H-pyran-2-yloxy)-6,8,11-trihydroxy-8-(2-hydroxyacetyl)-1-methoxy-7,8,9,10-tetrahydrotetracene-5,12-dione| image = Doxorubicin.svg| image2=Doxorubicin-3d-sticks.png| CAS_number = 23214-92-8| ATC_prefix = L01| ATC_suffix =DB01| PubChem = 31703| DrugBank = APRD00185| chemical_formula =| C = 27 |H = 29 |N = 1 |O = 11| molecular_weight = 543.52 Gram/Mole (unit)| bioavailability = 5% (Oral)| protein_bound =| metabolism = CYP3A4, [2005. Vol. 11 (19). Retrieved on April 19, 2007.]-->Doxorubicin' (trade name Adriamycin) or hydroxyldaunorubicin is a DNA-interacting pharmaceutical widely used in chemotherapy. It is an anthracycline antibiotic and structurely closely related to daunomycin, and also intercalation (chemistry) DNA. It is commonly used in the treatment of a wide range of cancers.

The drug is administered by injection, and may be sold under the brand names Adriamycin PFS, Adriamycin RDF, or Rubex." Doxorubicin (Systemic)." Mayo Clinic. Last updated on: June 15, 1999. Retrieved on April 19, 2007. Doxil is a liposome-encapsulated dosage form of doxorubicin made by Ben Venue Laboratories for Johnson & Johnson. The main benefits of this form are a reduction in cardiotoxicity.

History The history of doxorubicin can be traced back to the 1950s, when an Italy research company, Farmitalia Research Laboratories, began an organized effort to find anticancer compounds from soil-based microbes. A soil sample was isolated from the area surrounding the Castel del Monte, a 13th century castle. A new strain of Streptomyces which produced a bright red pigment was isolated, and an antibiotic was produced from this bacterium that was found to have good activity against Murinaes. Since a group of France researchers discovered the same compound at about the same time, the two teams named the compound daunorubicin, combining the name List of Illyrian tribes, a pre-Roman tribe that occupied the area of Italy where the compound was isolated, with the French word for ruby, rubis, describing the color.Weiss, Raymond B. "The Anthracyclines: Will We Ever Find a Better Doxorubicin?" Seminars in Oncology. Vol. 19, No. 6. December 1992. pp. 670–686. PMID 1462166. Clinical trials began in the 1960s, and the drug saw success in treating acute leukemia and lymphoma. However, by 1967, it was recognized that daunorubicin could produce fatal cardiac toxicity.Tan, C.; Tasaka, H.; Kou-Ping, Y.; et al. Daunomycin, An Antitumor Antibiotic, In the Treatment of Neoplastic Disease. Clinical Evaluation with Special Reference to Childhood Leukemia. 1967, Cancer, 20, 333 – 353. PMID 4290058.

Researchers at Farmitalia soon discovered that changes in biological activity could be made by minor changes in the structure of the compound. A strain of Streptomyces was mutated using N-nitroso-N-methyl urethane and this new strain produced a different, red-colored antibiotic. They named this new compound Adriamycin, after the Adriatic Sea, and the name was later changed to doxorubicin to conform to the established naming convention.Arcamone, F.; Cassinelli, G.; Fantini, G.; et al. Adriamycin, 14-hydroxydaunomycin, A New Antitumor Antibiotic from S. peucetius var. caesius. 1969, Biotechnol. Bioeng., 11, 1101 – 1110. PMID 5365804. Doxorubicin showed better activity than daunorubicin against murine tumors, and especially solid tumors. It also showed a relatively higher therapeutic index, yet the cardiotoxicity remained.Di Marco, A.; Gaetani, M.; Scarpinato, B. Adriamycin (NSC-123,127): A New Antibiotic with Antitumor Activity. 1969, Cancer Chemotherapy Reports, 53, 33 – 37. PMID 5772652.

Doxorubicin and daunorubicin together can be thought of as prototype compounds for the anthracyclines. Subsequent research by many investigators throughout the world has led to many other anthracycline antibiotics, or analogs, and today, it is estimated that there are over 2,000 known analogs of doxorubicin. By 1991, 553 of them have been evaluated in the screening program at the National Cancer Institute (NCI).

Biosynthesis Doxorubicin (DXR) is a 14-hydroxylated version of daunorubicin, the immediate precursor of DXR in its Biosynthesis pathway. Daunorubicin is more abundantly found as a natural product because it is produced by a number of different wild type Strain (biology)s of streptomyces. In contrast, only one known non-wild type species, streptomyces peucetius subspecies cesius ATCC 27952, was initially found to be capable of producing the more widely used doxorubicin. This strain was created by Arcamone et. al in 1969 by mutation a Strain (biology) producing daunorubicin, but not DXR, at least in detectable quantities. Subsequently, Hutchinson's group showed that under special environmental conditions, or by the introduction of Modifications (genetics), other strains of streptomyces can produce doxorubicin. His group has also cloned many of the genes required for DXR production, although not all of them have been fully characterized. In 1996, Strohl's group discovered, isolated and characterized dox A, the gene encoding the enzyme that converts daunorubicin into DXR. By 1999, they produced recombinant Dox A, a Cytochrome P450 oxidase, and found that it catalyzes multiple steps in DXR biosynthesis, including steps leading to daunorubicin. This was significant because it became clear that all daunorubicin producing strains have the necessary genes to produce DXR, the much more therapeutically important of the two. Hutchinson's group went on to develop methods to improve the yield of DXR, from the Industrial fermentation process used in its commercial production, not only by introducing Dox A encoding plasmids, but also by introducing mutations to deactivate enzymes that shunt DXR precursors to less useful products, for example baumycin-like glycosides. Some triple mutants, that also gene expression Dox A, were able to double the yield of DXR. This is of more than academic interest because at that time DXR cost about $1.37 million per kg and current production in 1999 was 225 kg per annum. More efficient production techniques have brought the price down to $1.1 million per kg for the non-liposomal formulation. Although DXR can be produced semisynthesis from daunorubicin, the process involves electrophilic bromination and multiple steps and the yield is poor. Since daunorubicin is produced by Fermentation (biochemistry), it would be ideal if the bacteria could complete DXR synthesis more effectively.

Mechanism of action The exact mechanism of action of doxorubicin is complex and still somewhat unclear, though it is thought to interact with DNA by intercalation.Fornari, F.A.; Randolph, J.K.; Yalowich, J.C.; Ritke, M.K.; Gewirtz, D.A. Interference by Doxorubicin with DNA Unwinding in MCF-7 Breast Tumor Cells. 1994, Molecular Pharmacology, 45, 649 – 656. PMID 8183243. Doxorubicin is known to interact with DNA by Intercalation (disambiguation) and inhibition of macromolecular biosynthesis.Momparler, R.L.; Karon, M.; Siegel, S.E.; Avila, F. Effect of Adriamycin on DNA, RNA and Protein Synthesis in Cell-Free Systems and Intact Cells. 1976, Cancer Research, 36, 2891 – 2895. PMID 1277199. Free full text This inhibits the progression of the enzyme topoisomerase II, which unwinds DNA for Transcription (genetics). Doxorubicin stabilizes the topoisomerase II complex after it has broken the DNA chain for replication, preventing the DNA double helix from being resealed and thereby stopping the process of DNA replication.

The planar aromatic chromophore portion of the molecule intercalates between two base pairs of the DNA, while the six-membered daunosamine sugar sits in the minor groove and interacts with flanking base pairs immediately adjacent to the intercalation site, as evidenced by several crystal structures.Frederick, C.A.; Williams, L.D.; Ughetto, G.; van der Marel, G.A.; van Boom, J.H.; Rich, A.; Wang, A.H. Structural Comparison of Anticancer Drug-DNA Complexes: Adriamycin and Daunomycin. 1990, Biochemistry, 29, 2538 – 2549. PMID 2334681. Crystal structure is available for download as a PDB file.Pigram, W.J.; Fuller, W.; Hamilton, L.D. Stereochemistry of Intercalation: Interaction of Daunomycin with DNA. 1972, Nature New Biology, 235, 17 – 19. PMID 4502404.

Clinical use Doxorubicin is commonly used to treat some leukemias, Hodgkin's lymphoma, as well as cancers of the bladder cancer, breast cancer, stomach cancer, lung cancer, ovarian cancer, thyroid cancer, soft tissue sarcoma, multiple myeloma, and others. Commonly used doxorubicin-containing chemotherapy regimen are CA (cyclophosphamide, Adriamycin), TAC (Taxotere, CA), ABVD (Adriamycin, Bleomycin, Vinblastine, Dacarbazine), CHOP (Cyclophosphamide, Adriamycin, Vincristine, Prednisone) and FAC (5-Fluorouracil, Adriamycin, Cyclophosphamide). Doxil is used primarily for the treatment of ovarian cancer where the disease has progressed or recurred after platinum-based chemotherapy, or for the treatment of AIDS-related Kaposi's sarcoma." DOXIL Product Information." Ortho Biotech Products, L.P. Retrieved on April 19, 2007.

Experimental therapy Combination therapy experiments with sirolimus (rapamycin) and doxorubicin have shown promise in treating Akt-positive lymphomas in mice.

Recent animal research coupling a Murinae monoclonal antibody with doxorubicin has created an immunoconjugate that was able to eliminate HIV infection in mice. Current treatment with antiretroviral drug (ART) still leaves pockets of HIV within the host. The immunoconjugate could potentially provide a complimentary treatment to ART to eradicate antigen-expressing T cells.

Side effects Acute side-effects of doxorubicin can include nausea, vomiting, and heart arrhythmias. It can also cause neutropenia (a decrease in white blood cells), as well as complete alopecia (hair loss). When the cumulative dose of doxorubicin reaches 550 mg/m², the risks of developing cardiac side effects, including congestive heart failure, dilated cardiomyopathy, and death, dramatically increase. Doxorubicin cardiotoxicity is characterized by a dose-dependent decline in mitochondrial oxidative phosphorylation. Reactive oxygen species, generated by the interaction of doxorubicin with iron, can then damage the myocytes (heart cells), causing myofibrillar loss and cytoplasmic vacuolization. Additionally, some patients may develop Palmar plantar erythrodysesthesia, or, "Hand-Foot Syndrome," characterized by skin eruptions on the palms of the hand or soles of the feet, characterized by swelling, pain and erythema.

Due to these side effects and its red color, doxorubicin has earned the nickname "red devil."

See also

References

External links



Doxorubicin : Cancerbackup
Doxorubicin is a chemotherapy drug that is given as a treatment for many different types of cancer. This section describes how it is given and some of its possible side effects.

Liposomal doxorubicin (Caelyx®, Myocet®) : Cancerbackup
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Cancer Research UK | CancerHelp UK | Doxorubicin
This page tells you about the possible side effects of doxorubicin. There aresections onWhat doxorubicin isCommon side effectsOccasional side effectsHigh dose side effectsImportant ...

Doxorubicin - Wikipedia, the free encyclopedia
Doxorubicin (trade name Adriamycin) or hydroxyldaunorubicin is a drug widely used in cancer chemotherapy. It is an anthracycline antibiotic and structurally closely related to ...

The electronic Medicines Compendium
This is the official professional web site of the Electronic Medicines Compendium ... Below are a number of possible matches for 'Doxorubicin'. We have looked for this term in the ...

Definition: doxorubicin from Online Medical Dictionary
The Online Medical Dictionary is a searchable dictionary of definitions from medicine, science and technology.

MedlinePlus Drug Information: Doxorubicin
Provides description of drug, list of cancers medicine is used for, precautions, side effects, and common brand names.

Doxorubicin Hydrochloride - National Cancer Institute
This page contains brief information about doxorubicin hydrochloride and a collection of links to more information from the National Cancer Institute (NCI), the Food and Drug ...

Doxorubicin : BC Cancer Agency
The BC Cancer Agency is a part of the Provincial Health Services Authority.

Ovarian cancer (advanced) - paclitaxel, pegylated liposomal ...
The summary for the published technology appraisal on using topotecan, pegylated liposomal doxorubicin hydrochloride and paclitaxel for the treatment of advanced ovarian cancer.

 

Doxorubicin



 
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