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10-minute, quantitative lentiviral titer test—Lenti-X GoStix Plus

Instant test for lentivirus titer

Lenti-X GoStix Plus provide a rapid, simple, and effective method for instantly quantifying lentivirus in packaging cell supernatants. The test involves applying 20 µl of supernatant to a GoStix cassette and waiting 10 minutes for the appearance of bands that indicate the presence of lentiviral p24. Whereas our original GoStix provided a qualitative output, results from Lenti-X GoStix Plus can be analyzed with a free smartphone app, which quantifies lentivirus titer by comparing the band intensities.

Lenti-X GoStix Plus provide a rapid, simple, and effective method for instantly quantifying lentivirus in packaging cell supernatants. The test involves applying 20 µl of supernatant to a GoStix cassette and waiting 10 minutes for the appearance of bands that indicate the presence of lentiviral p24. Whereas our original GoStix provided a qualitative output, results from Lenti-X GoStix Plus can be analyzed with a free smartphone app, which quantifies lentivirus titer by comparing the band intensities.

The quantitative output from the Lenti-X GoStix App (referred to as a GoStix Value, or GV) can be used to compare virus amounts between different preparations in a manner similar to, but far easier and quicker than, an ELISA, and allows for calculation of actual IFU/ml using a reference virus. Visit our FAQs page for information on how to download and use the smartphone app.

By enabling quick and easy lentivirus quantitation, Lenti-X GoStix Plus allow you to minimize variability in your transduction protocol and achieve consistent performance for each experiment.

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Cat. # Product Size Price License Quantity Details
631280 Lenti-X™ GoStix™ Plus 20 Tests $438.00

License Statement

ID Number  
89 This product is protected by U.S. Patent 9,945,850 and additional pending patent. For further license information, please contact a Takara Bio USA licensing representative by email at licensing@takarabio.com.

Lenti-X GoStix Plus provide a rapid, simple, and effective method for instantly quantifying lentivirus in packaging cell supernatants. The test involves applying 20 µl of supernatant to a GoStix cassette and waiting 10 minutes for the appearance of test and control bands that indicate the presence of lentiviral p24. The results on the cassette can then be analyzed using a free smartphone app, which quantifies lentivirus titer by comparing the intensities of the test and control bands.

The quantitative output from the Lenti-X GoStix App (referred to as a GoStix Value, or GV) can be used to compare virus amounts between different preparations in a manner similar to, but far easier and quicker than, an ELISA, and allows for calculation of actual IFU/ml using a reference virus.

Cat. # 631280 includes sufficient reagents and cassettes for performing 20 tests.

Notice to purchaser

Our products are to be used for Research Use Only. They may not be used for any other purpose, including, but not limited to, use in humans, therapeutic or diagnostic use, or commercial use of any kind. Our products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products or to provide a service to third parties without our prior written approval.

Documents Components Image Data

Back

Titration with Lenti-X GoStix Plus takes only ten minutes, which is significantly shorter than titration times required for conventional methods

Titration with Lenti-X GoStix Plus takes only ten minutes, which is significantly shorter than titration times required for conventional methods
Most commonly used methods of lentiviral vector titration and their associated timelines (in hours). Lenti-X GoStix Plus: a lateral flow-based method for the detection of lentiviral p24 in supernatants. qRT-PCR: quantitation of viral RNA genomes by qRT-PCR. ELISA: measurement of the amount of p24 capsid protein. PCR: detection of integrated DNA proviruses by qPCR. IFU (FACS):determination of the percentage of infected cells via FACS analysis of RFP/GFP positive cells. IFU (Selection): infectious units determined by quantifying the number of drug resistant colonies in transduced populations.

Back

p24 production, GoStix Value, and IFU/ml depend on harvest time

p24 production, GoStix Value, and IFU/ml depend on harvest time

p24 production, GoStix Value, and IFU/ml are dependent on harvest time. ZsGreen1 lentivirus preparations were made in duplicate in accordance with the manufacturer's instructions using Lenti-X Single Shots and harvested at the times indicated. At each timepoint, samples were analyzed for GV using Lenti-X GoStix Plus and virus dilutions were titrated on HT1080 cells to determine IFU/ml. In addition to showing that GV (i.e., p24 accumulation) and IFU/ml are dependent on harvest time, these data demonstrate that the ratio between GV and IFU/ml changes over time.

Back

Lenti-X GoStix Plus-based titers correlate with transduction titers across varying concentrations

Lenti-X GoStix Plus-based titers correlate with transduction titers across varying concentrations
Lenti-X GoStix Plus-based titers correlate with transduction titers across varying concentrations. Lenti-X ZsGreen1 lentivirus was prepared using the Lenti-X Packaging Single Shots lentiviral packaging system. The sample preparation was serially diluted and added to Lenti-X GoStix Plus cassettes and densitometric analysis was performed. In addition, each dilution was titrated on HT1080 cells to determine actual IFU/ml. The IFU/ml for the unknown samples was calculated using a GV to IFU/ml ratio determined from a reference virus produced using the same packaging system and the same harvest time as the unknown sample. The IFU/ml calculated from the Lenti-X GoStix Plus was then plotted against the actual IFU/ml.

Back

The Lenti-X GoStix App quantifies titer by measuring the relative intensities of test and control bands on the GoStix cassette

The Lenti-X GoStix App quantifies titer by measuring the relative intensities of test and control bands on the GoStix cassette
The Lenti-X GoStix App uses a smartphone camera to determine the relative intensities of the test (T) and control (C) bands and uses the ratio to calculate the titer.

Back

Lenti-X GoStix Plus-based titers correlate with transduction titers across varying packaging systems.

Lenti-X GoStix Plus-based titers correlate with transduction titers across varying packaging systems.
Lenti-X GoStix Plus-based titers correlate with transduction titers across varying packaging systems. ZsGreen1 lentivirus was prepared using three different commercially available lentiviral vector and packaging systems. Samples for all preparations were diluted and added to Lenti-X GoStix Plus cassettes and analyzed. In addition, each dilution was titrated on HT1080 cells to determine actual IFU/ml. The IFU/ml for each unknown sample was calculated using a GV to IFU/ml ratio determined from a reference virus produced using the same packaging system and the same harvest time as the unknown sample.

Back

Lenti-X GoStix Plus-based titers perform comparably to ELISA-based titers

Lenti-X GoStix Plus-based titers perform comparably to ELISA-based titers
Lenti-X GoStix Plus-based titers can be used in a similar fashion as ELISA-based titers. Lenti-X ZsGreen1 lentivirus was prepared using the Lenti-X Packaging Single Shots lentiviral packaging system. Percentages of cells transduced (% transduced) were determined on HT1080 cells followed by FACS analysis. In addition, the viral p24 value was assessed using the Lenti-X p24 Rapid Titer Kit and the GoStix Value was determined using Lenti-X GoStix Plus. Transductions were performed on HT1080 cells using a range of MOIs and the resulting transduction efficiencies were plotted against the associated ELISA and GoStix Value equivalents. Fluorescent images of the transduced cells were taken at 48 hours post-transduction.
631281 Lenti-X™ GoStix™ Plus 50 Tests $898.00

License Statement

ID Number  
89 This product is protected by U.S. Patent 9,945,850 and additional pending patent. For further license information, please contact a Takara Bio USA licensing representative by email at licensing@takarabio.com.

Lenti-X GoStix Plus provide a rapid, simple, and effective method for instantly quantifying lentivirus in packaging cell supernatants. The test involves applying 20 µl of supernatant to a GoStix cassette and waiting 10 minutes for the appearance of test and control bands that indicate the presence of lentiviral p24. The results on the cassette can then be analyzed using a free smartphone app, which quantifies lentivirus titer by comparing the intensities of the test and control bands.

The quantitative output from the Lenti-X GoStix App (referred to as a GoStix Value, or GV) can be used to compare virus amounts between different preparations in a manner similar to, but far easier and quicker than, an ELISA, and allows for calculation of actual IFU/ml using a reference virus.

Cat. # 631281 includes sufficient reagents and cassettes for performing 50 tests.   

Notice to purchaser

Our products are to be used for Research Use Only. They may not be used for any other purpose, including, but not limited to, use in humans, therapeutic or diagnostic use, or commercial use of any kind. Our products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products or to provide a service to third parties without our prior written approval.

Documents Components Image Data

Back

Titration with Lenti-X GoStix Plus takes only ten minutes, which is significantly shorter than titration times required for conventional methods

Titration with Lenti-X GoStix Plus takes only ten minutes, which is significantly shorter than titration times required for conventional methods
Most commonly used methods of lentiviral vector titration and their associated timelines (in hours). Lenti-X GoStix Plus: a lateral flow-based method for the detection of lentiviral p24 in supernatants. qRT-PCR: quantitation of viral RNA genomes by qRT-PCR. ELISA: measurement of the amount of p24 capsid protein. PCR: detection of integrated DNA proviruses by qPCR. IFU (FACS):determination of the percentage of infected cells via FACS analysis of RFP/GFP positive cells. IFU (Selection): infectious units determined by quantifying the number of drug resistant colonies in transduced populations.

Back

p24 production, GoStix Value, and IFU/ml depend on harvest time

p24 production, GoStix Value, and IFU/ml depend on harvest time

p24 production, GoStix Value, and IFU/ml are dependent on harvest time. ZsGreen1 lentivirus preparations were made in duplicate in accordance with the manufacturer's instructions using Lenti-X Single Shots and harvested at the times indicated. At each timepoint, samples were analyzed for GV using Lenti-X GoStix Plus and virus dilutions were titrated on HT1080 cells to determine IFU/ml. In addition to showing that GV (i.e., p24 accumulation) and IFU/ml are dependent on harvest time, these data demonstrate that the ratio between GV and IFU/ml changes over time.

Back

Lenti-X GoStix Plus-based titers correlate with transduction titers across varying concentrations

Lenti-X GoStix Plus-based titers correlate with transduction titers across varying concentrations
Lenti-X GoStix Plus-based titers correlate with transduction titers across varying concentrations. Lenti-X ZsGreen1 lentivirus was prepared using the Lenti-X Packaging Single Shots lentiviral packaging system. The sample preparation was serially diluted and added to Lenti-X GoStix Plus cassettes and densitometric analysis was performed. In addition, each dilution was titrated on HT1080 cells to determine actual IFU/ml. The IFU/ml for the unknown samples was calculated using a GV to IFU/ml ratio determined from a reference virus produced using the same packaging system and the same harvest time as the unknown sample. The IFU/ml calculated from the Lenti-X GoStix Plus was then plotted against the actual IFU/ml.

Back

The Lenti-X GoStix App quantifies titer by measuring the relative intensities of test and control bands on the GoStix cassette

The Lenti-X GoStix App quantifies titer by measuring the relative intensities of test and control bands on the GoStix cassette
The Lenti-X GoStix App uses a smartphone camera to determine the relative intensities of the test (T) and control (C) bands and uses the ratio to calculate the titer.

Back

Lenti-X GoStix Plus-based titers correlate with transduction titers across varying packaging systems.

Lenti-X GoStix Plus-based titers correlate with transduction titers across varying packaging systems.
Lenti-X GoStix Plus-based titers correlate with transduction titers across varying packaging systems. ZsGreen1 lentivirus was prepared using three different commercially available lentiviral vector and packaging systems. Samples for all preparations were diluted and added to Lenti-X GoStix Plus cassettes and analyzed. In addition, each dilution was titrated on HT1080 cells to determine actual IFU/ml. The IFU/ml for each unknown sample was calculated using a GV to IFU/ml ratio determined from a reference virus produced using the same packaging system and the same harvest time as the unknown sample.

Back

Lenti-X GoStix Plus-based titers perform comparably to ELISA-based titers

Lenti-X GoStix Plus-based titers perform comparably to ELISA-based titers
Lenti-X GoStix Plus-based titers can be used in a similar fashion as ELISA-based titers. Lenti-X ZsGreen1 lentivirus was prepared using the Lenti-X Packaging Single Shots lentiviral packaging system. Percentages of cells transduced (% transduced) were determined on HT1080 cells followed by FACS analysis. In addition, the viral p24 value was assessed using the Lenti-X p24 Rapid Titer Kit and the GoStix Value was determined using Lenti-X GoStix Plus. Transductions were performed on HT1080 cells using a range of MOIs and the resulting transduction efficiencies were plotted against the associated ELISA and GoStix Value equivalents. Fluorescent images of the transduced cells were taken at 48 hours post-transduction.

Tips and FAQs Lenti-X GoStix Plus FAQs
Learn about lentiviral transduction experiments Lentivirus learning center
Overviews Premade lentiviral particles

Overview

  • Quantify lentivirus titer in 10 minutes using a simple smartphone app*
  • Determine the optimal time to harvest lentiviral supernatants
  • Achieve consistent transduction performance for your experiments

*The original Lenti-X GoStix (Cat # 631243 and 631244) cannot be used for lentivirus quantitation with the smartphone app and are being phased out. These items will no longer be available once inventories are depleted. If desired, Lenti-X GoStix Plus can be used for qualitative analyses in the same manner as the original Lenti-X GoStix.

More Information

Applications

  • Confirm successful lentiviral packaging reactions
  • Compare virus amounts between different preparations

Additional product information

Please see the product's Certificate of Analysis for information about storage conditions, product components, and technical specifications. Please see the Kit Components List to determine kit components. Certificates of Analysis and Kit Components Lists are located under the Documents tab.


Quantify lentiviral titer in 10 minutes using Lenti-X GoStix Plus

Lenti-X GoStix Plus

Lenti-X GoStix Plus are an amazingly simple solution for quantifying the amount of virus produced by your packaging cells. Apply 20 µl of your lentiviral supernatant and four drops of buffer to a GoStix cassette, wait for the indicator bands to appear, and then scan the bands using a smartphone app. Takes just 10 minutes!

Watch the video Lentiviral products guide

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Takara Bio USA, Inc. (TBUSA, formerly known as Clontech Laboratories, Inc.) provides kits, reagents, instruments, and services that help researchers explore questions about gene discovery, regulation, and function. As a member of the Takara Bio Group, TBUSA is part of a company that holds a leadership position in the global market and is committed to improving the human condition through biotechnology. Our mission is to develop high-quality innovative tools and services to accelerate discovery.

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