The Endosafe®-PTS™ is a handheld spectrophotometer that utilizes FDA- licensed disposable cartridges for accurate, convenient endotoxin testing. With test. A multicenter comparison study between the Endosafe PTS rapid-release testing system and traditional methods for detecting endotoxin in cell-therapy products. The Endosafe®-PTS™ is a rapid, point-of-use test system that provides quantitative LAL results within 15 minutes. The PTS™ utilizes LAL reagents in an .

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Charles River Endosafe PTS Endotoxin Testing System

By the amplification of a small signal, these enzyme cascades allow detection of very low amounts of starting microbial material. Tests with these cartridges have been performed during Expeditions 18 ptw An astronaut can take a swab sample from a cabin surface, dissolve it in endotoxin-free water, and analyze it quantitatively with LOCAD-PTS in microgravity, all in under 15 minutes. Valid paired results, based on each center’s LAL method and the Endosafe system criteria, were analyzed.

Karissa West performs microbial survey of Pad 39A August 7, Preliminary results with these cartridges showed similar patterns to those observed for endotoxin, but glucan was found at higher levels and found to be enrosafe more widespread throughout the ISS. Retrieved from ” https: Before LOCAD-PTS was launched to space, it was tested extensively in simulated microgravity with the use of parabolic flightto verify nominal function of the instrument and sample handling procedures.


LOCAD – Wikipedia

Additionally, fabricated endotoxin-positive samples containing varying concentrations of endotoxin were prepared and shipped to all centers to perform blinded testing.

The Endosace system provided reliable results with products typically produced in cell-therapy manufacturing facilities, and would be an appropriate test on which to base the release of time-sensitive cell-therapy products.

Endotoxin was found at every surface site where Colony Forming Units CFUs were observed with culture-based contact slide methods. The Endosafe portable test system PTS is a chromogenic Limulus amebocyte lysate LAL portable endotoxin detection system that provides quantitative results in approximately 15 min. The goal of the experiment is to design and test procedures to monitor and document the spread of biological material associated with human spaceflight, both before and after launch, in preparation for the human exploration of the Moon and Mars.

Endotoxin and glucan are detected with the Limulus amebocyte lysate LAL enzyme cascade, derived from the horseshoe crab Limulus polyphemus. Rapid-release testing reduces the waiting period for administration of time-sensitive cell-therapy products. All samples tested with the Endosafe system used 0.

Gravitational Physiology, Ensosafe 10, Issue 2, This page was last edited on 8 Novemberat In other projects Wikimedia Commons. The device itself or reader weighs 2. This ‘swab’ was performed indirectly with the spacesuit gloves.


The projects develop integrated lab-on-a-chip products in three areas related to space exploration: Subsequently, each center tested the endotoxin content of standard dilutions of cell-therapy products, thus creating paired test results for each sample.

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Endosafe nexgen-PTS from Charles River

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These three molecules are found mainly within gram-negative bacteriafungi and gram-positive bacteriarespectively. From Wikipedia, the free encyclopedia.

Endosafe-PTS Glucan Assay from Charles River

Endotoxin detection between paired results was equivalent in most tps. Traditional culture-based methods aboard the ISS take several days and often require return of samples to Earth for more in-depth analysis by scientists on the ground. Current assay systems are labor intensive and time consuming.