Table of Contents
What is endotoxin testing in pharmaceuticals?
A bacterial endotoxin test (BET), such as LAL (limulus amebocyte lysate), is an in vitro assay used to detect bacterial endotoxins. The bacterial endotoxin test uses the lysate from blood cells from horseshoe crabs to detect bacterial endotoxins.
What is endotoxin in pharmaceutical industry?
An Endotoxin is defined as a poisonous complex molecule (lipopolysaccharide) that forms an integral part of the bacterial (gram-negative bacteria) cell wall and is only released when the integrity of the wall is disturbed.
Why is it important to detect endotoxins?
In the manufacturing of pharmaceuticals, it is important to test products meant for humans for the presence of endotoxins. Testing, detection and removal of endotoxins is an important quality control step to ensure safe pharmaceuticals are delivered to patients.
What is MVD in BET test?
The Maximum Valid Dilution (MVD) is the maximum allowable dilution of a sample at which the endotoxin limit can be determined.
How do you convert EU mg to EU ML?
A simple multiplication converts an Endotoxin Limit in EU/mg to EU/ml. For example, a 10 mg / ml solution of a drug whose Endotoxin Limit is 5 EU/mg = 50 EU /ml [5 EU/mg x 10 mg/ml]. The MVD (Maximum Valid Dilution) = Endotoxin Limit / lambda.
What is EU MG?
The mass is typically expressed in milligrams. Then divide the endotoxin limit for the maximum dose by the total mass of the components in that dose. This gives a limit per unit mass (e.g. EU/mg) that applies to all of the components, not just the drug substance.
What is PPC in endotoxin test?
The Bacterial Endotoxins Test Monograph (BET) requires that when a final product is being tested for the presence of endotoxin, a Positive Product Control (PPC) is performed to confirm that the product being tested, using the validated dilution, is not subject to interfering factors.
What is the difference between IU and EU?
How do I convert from EU to IU? The conversion of results of an LAL test expressed in EU/mL into IU/mL is very easy: 1 EU=1 IU. The United States Pharmacopoeia, the World Health Organization and the European Pharmacopoeia have adopted a common standard.
What is the difference between IU mL and EU mL?
The conversion of results of an LAL test expressed in EU/mL into IU/mL is very easy: 1 EU=1 IU. The United States Pharmacopoeia, the World Health Organization and the European Pharmacopoeia have adopted a common standard.
What is bioburden limit?
The EMA guideline further states that a bioburden limit of no more than 10 colony-forming units (CFU) per 100 mL will be considered acceptable in most situations. The EMA guideline also states that a pre-filtration sample volume of less than 100 mL may be tested if justified.
What is EU per mL?
Endotoxin is measured in endotoxin units per milliliter (EU/mL). One EU equals approximately 0.1 to 0.2 ng endotoxin/mL of solution. Currently there are three forms of the LAL assay, each with different sensitivities.
How many types of endotoxins are there?
Toxins are of two types: Exotoxins and Endotoxins.
| S.N. | Character | Endotoxins |
|---|---|---|
| 2. | Produced by | Gram negative bacteria. |
| 3. | Chemical Nature | Lipopolysaccharide-protein complexes |
| 4. | Molecular weight | 50-1000KDa. |
| 5. | Components | Composed of three basic components: 1. O-antigen 2. Core oligosaccharide 3. Lipid A |
What is endotoxin tolerance?
Endotoxin tolerance is defined as the reduced capacity of a cell to respond to gram(-) bacterial lipopolysaccharide (LPS) after an initial exposure to this stimulus (1, 2).
What is minimum valid concentration?
The minimum valid concentration (MVC) is the product concentration at the MVD. It is important to know the MVD and/or MVC when confronted with a new product to test or validate. The significance ofthe MVD is best illustrated by an example.
How is EU mL calculated?
When is endotoxin testing required?
The FDA reviews new drug applications or changes to already approved products. If the product will come in contact with the blood stream or cerebrospinal fluid, the product submissions must include endotoxin testing results indicating that the product has an endotoxin content below its allowable endotoxin release limit.
How is endotoxin tested?
substances can be tested with the kinetic chromogenic technique. This approach allowed us to obtain quantitative measurements of endotoxin in samples that previously could only have been tested using the gel-clot technique. The chromogenic assay offers a fifteen-fold improvement in sensitivity compared to the most sensitive gel-
How is endotoxin measured in industry?
Quantification of endotoxin.
What is FDA testing?
Protecting the public health by assuring that foods (except for meat from livestock,poultry and some egg products which are regulated by the U.S.