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Etoposide is a semisynthetic derivative of podophyllotoxin from the rhizome of the mayapple (or "American mandrake", Podophyllum peltatum). More specifically, it is a glycoside of podophyllotoxin with a D - glucose derivative.
Etoposide, a semi-synthetic derivative of epipodophyllotoxin is commonly used to study this apoptotic mechanism and include: Etoposide; Teniposide; Both etoposide and teniposide are naturally occurring semi-synthetic derivatives of podophyllotoxins and are important anti-cancer drugs that function to inhibit TopII activity. [67]
Etoposide, an epipodophyllotoxin. Epipodophyllotoxins are substances naturally occurring in the root of American Mayapple plant (Podophyllum peltatum). Some epipodophyllotoxin derivatives are currently used in the treatment of cancer. These include etoposide and teniposide. They act as anti-cancer drugs by inhibiting topoisomerase II. [1]
Etoposide: a topoisomerase inhibitor from the group of epipodophyllotoxins; Prednisolone: a glucocorticoid hormone that can cause apoptosis and lysis of both normal and malignant lymphocytes; Oncovin, also known as vincristine: a vinca alkaloid that binds to the protein tubulin, thereby preventing the formation of microtubules and mitosis;
Type II topoisomerases increase or decrease the linking number of a DNA loop by 2 units, and it promotes chromosome disentanglement. For example, DNA gyrase, a type II topoisomerase observed in E. coli and most other prokaryotes, introduces negative supercoils and decreases the linking number by 2.
In some literature articles, the terms "mechanism of action" and "mode of action" are used interchangeably, typically referring to the way in which the drug interacts and produces a medical effect. However, in actuality, a mode of action describes functional or anatomical changes, at the cellular level, resulting from the exposure of a living ...
As an example, the incidence of congestive heart failure is 4.7%, 26% and 48% respectively when patients received doxorubicin at 400 mg/m 2, 550 mg/m 2 and 700 mg/m 2. [4] Therefore, the lifetime cumulative doxorubicin exposure is limited to 400–450 mg/m 2 in order to reduce congestive heart failure incidence to less than 5%, although ...
This mechanism is distinct from that of the type IA enzymes, and the two groups of enzymes are structurally and evolutionarily unrelated. Examples of type IB topoisomerases include eukaryotic nuclear and mitochondrial topo I in addition to viral topo I, though they have been identified in all three domains of life.