AAV9 Titration ELISA Kit | Creative Diagnostics DEIAAV9 product information

product summary

company name :

Creative Diagnostics

product type :

ELISA/assay

product name :

AAV9 Titration ELISA Kit

catalog :

DEIAAV9

quantity :

96T

more info or order :

Creative Diagnostics product webpage

product information

Catalog :

DEIAAV9

proudctName :

AAV9 Titration ELISA Kit

common :

AAV

Short Name :

AAV9 Titration ELISA Kit

Detection Method :

sELISA

Common name :

AAV

Application :

Quantitative

Sample :

cell culture supernatants, purified virus preparations

Size :

96T

Storage :

Store the test kit and components at 2-8°C. The unopened reagents are stable at 2-8°C until the indicated expiry date.

Target :

AAV9

Intended Use :

Enzyme-linked immunosorbent assay (ELISA) for the quantitative determination of AAV serotype 9 particles in cell culture supernatants and purified virus preparations.

General Description :

Adeno-associated viruses (AAV) are non-pathogenic ssDNA viruses, which are subject of intense studies as viral vectors for gene therapy. The virus transduces a variety of dividing and non-dividing cells showing long-term gene expression with low cellular immune response. AAV has been used in several clinical trials (e.g. FIX, CFTR, Parkinson's, Canavan disease) showing no serious vector-related adverse effects. Methods for the characterization of AAV preparations currently include titration ELISA, qPCR, ddPCR, DNA dot blot, determination of transducing units, infectious center assay, SDS-PAGE or electron microscopy. Immunotitration by Creative Diagnostics' AAV9 Titration ELISA offers a fast, sensitive and reproducible method for titration of intact AAV9 wild-type virions, AAV9 recombinant virions or assembled and intact empty AAV9 capsids.

Principle Of The Test :

The assay is based on the sandwich ELISA technique. A monoclonal antibody specific for a conformational epitope on assembled AAV9 capsids is coated onto strips of a microtiter plate, captured AAV particles are detected in two steps: 1. Another Anti-AAV9 antibody was used as detection antibodies. 2. A Anti-Human IgG Fc Secondary Antibody reacts with the immunocomplex. Addition of substrate solution results in a color reaction, which is proportional to the amount of specifically bound viral particles. The absorbance is measured photometrically at 450 nm (optional: reference wavelength at 620 nm). The provided AAV9 standard contains an AAV9 particle preparation of empty capsids. Two-fold serial dilutions of the material result in a typical titration curve. The curve allows the quantitative determination of samples of an unknown particle titer.

Reagents And Materials Provided :

1.Microtiter Plate, 12 × 8-well-strips, coated with mouse monoclonal antibody to AAV9 in aluminum bag with desiccant, 1 plate. Ready- to-use. 2.AAV9 standard, lyophilized, 3 vials. Reconstitute before use. 3.Assay Buffer 20×, 50 ml. Dilute before use. 4.Anti-AAV9 Antibody, 12ml. Ready- to-use. 5.Anti-Human IgG Fc Conjugate, 12ml. Ready- to-use. 6.TMB Substrate, 6 ml × 2. Ready-to-use. 7.Stop Solution, 7 ml. Ready-to-use.

Materials Required But Not Supplied :

1.Precision pipettes 2.Sterile pipette tips 3.Distilled water 4.Reaction tubes 5.Incubator at at room temperature (20-25°C) 6.ELISA Reader (450 nm, optional: reference wavelength at 620 nm)

Specimen Collection And Preparation :

Pre-dilute your specimen containing AAV9 particles in Assay Buffer 1× in serial dilution steps to reach a concentration within the recommended quantification range of the ELISA. It might be necessary to perform a pre-experiment to determine the approximate titer of the unknown specimen before analyzing more finetuned dilutions.

Reagent Preparation :

Prior to use, allow kit to reach room temperature (RT, 20- 25°C). Preparation and pre-dilution of components: Dilute required reagent volumes immediately before use! Assay Buffer 20x 1. Dilute 1:19 with distilled water ( e.g. 10ml Assay Buffer 20× + 190ml distilled water). 2. The diluted component is named Assay Buffer 1×. AAV9 Standard 1. Reconstitute with 500 μl Assay Buffer 1×. 2. Incubate for 5 min at RT and then mix by rolling for another 5 min. Avoid vortexing. 3. Find the amount of vg/ml on the label. 4.We recommend diluting the reconstituted AAV9 Standard in Assay Buffer 1× as described below: An example for dilutions is provided on the lot-specific Example Curve document. Please find the lot-specific titer of the AAV9 Standard on the vial or on the Quality Control Certificate. Both the Example Curve document and the Quality Control Certificate are provided with the kit.

Assay Procedure :

1. Pipette 100 μl of Assay Buffer 1× (Std. 0), serial dilutions of AAV9 Standard and specimen (both in Assay Buffer 1×) in duplicates into the corresponding wells of the microtiter strips. Seal strips with adhesive foil and incubate for 1.5 h at 25°C. 2. Discard content of microtiter strips. For washing, fill each well with 250 μl of Assay Buffer 1×, incubate approximately 5 sec, discard and tap inverted plate onto absorbent paper. Carry out five washing steps in total. 3. Pipette 100 μl of Anti-AAV9 antibody solution into each well. Seal strips with adhesive foil and incubate for 1 h at 25°C. 4. Repeat washing step as described in 2. 5. Pipette 100 μl of Anti-Human IgG Fc Conjugate into each well. Seal strips with adhesive foil and incubate for 1 h at 25°C. 6. Repeat washing step as described in 2. 7. Pipette 100 μl of ready-to-use TMB into each well. Seal strips with adhesive foil and incubate for 15 min at 25°C. 8. Stop color reaction by adding 50 μl of Stop Solution into each well. 9. Make sure no air bubbles are in the wells. Within 5 min, measure color intensity with a photometer at a wavelength of 450 nm (optional: reference wavelength at 620nm.)

Quality Control :

The absorbance value of the undiluted AAV9 Standard should be > 1.5. The absorbance value of the Blank should be < 0.4.

Calculation :

If applicable, subtract values measured at 650 nm reference wavelength from values at 450 nm. The test is also valid if you use OD values at 450 nm only. Calculate the average absorbance values for each duplicate set of Standard AAV9 dilutions and specimen dilutions. Create a standard curve by plotting the mean absorbance value of each AAV9 Standard dilution (y-axis, linear scale) against the corresponding concentration (x-axis, logarithmic scale recommended). Use a best fit curve for calculating the results. We suggest using a suitable computer program for the calculation. A 4- parameter logistic fit (4PL) is recommended. Calculate the particle titer of your specimens. The kit is quantitative over the whole range of AAV9 Standard dilutions. For highest accuracy, the OD values of unknown samples should ideally be in the recommended range for quantification. Multiply the value obtained by the dilution factor to determine the amount of vg/ml in the sample. Please note: The standard curve needs to be determined for each experiment individually. For further orientation, please find the lot-specific Example Curve provided with the kit.

Detection Range :

0-1.47E+09vg/ml

Precautions :

1.For professional use. 2.The instruction manual is only valid in combination with the lot specific documents ( Example Curve and Quality Control Certificate), which are enclosed in each kit. Please make sure to use the instruction manual with the version number that corresponds to the number on the lot specific documents. 3.STOP (sulphuric acid) and TMB may cause skin or eye irritation. In the event of eye contact, rinse out immediately with plenty of water and consult a physician! Safety data sheet is available on request! 4.Chemicals and biological materials must be disposed of in compliance with the respective national regulations.

applicatons :

Enzyme-linked immunosorbent assay (ELISA) for the quantitative determination of AAV serotype 9 particles in cell culture supernatants and purified virus preparations.

Contents of Kit :

Tetramethylbenzidine :