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Analysis of wear, wear particles, and reduced inflammatory potential of vitamin E ultrahigh-molecular-weight polyethylene for use in total joint replacement.

Vitamin E (VE) has been added to ultrahigh-molecular-weight polyethylene (UHMWPE) acetabular cups and tibial trays primarily to reduce oxidative damage to the polymer. The aim of this study was to investigate the relative wear rates of...

Authors: Bladen CL1, Teramura S, Russell SL, Fujiwara K, Fisher J, Ingham E, Tomita N, Tipper JL.

HBD3 regulates matrix metalloproteinase production in human myeloid dendritic cells exposed to Porphyromonas gingivalis hemagglutinin B

Matrix metalloproteinases (MMP) are zinc- or calcium-dependent proteinases involved in the normal maintenance of the extracellular matrix. When elevated, MMPs degrade matrix components contributing to tissue destruction in infected periodontal sites....

Authors: Raina M

SST Peer Reviewed

Defensin DEFB103 bidirectionally regulates chemokine and cytokine responses to a pro-inflammatory stimulus.

Human ß defensin DEFB103 acts as both a stimulant and an attenuator of chemokine and cytokine responses: a dichotomy that is not entirely understood. Our predicted results using an in silico simulation model of dendritic cells and our observed...

Authors: Harvey LE, Kohlgraf KG, Mehalick LA, Raina M, Recker EN, Radhakrishnan S, Prasad SA, Vidva R,...

SST Peer Reviewed

Possible Mechanism of Low Endotoxin Recovery

Authors: M.Tsuchiya

When performing a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection assay how do I convert from EU/ml (Endotoxin Unit) to ng/ml?

Depending on the source of the endotoxin, the conversion from endotoxin units to nanograms will vary. The FDA initially defined the Endotoxin Unit (EU) as the endotoxin activity of 0.2 ng of Reference Endotoxin Standard, EC-2 or 5 EU/ng. To convert...

When performing a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection assay should I use matched reagents, lysate/CSE?

You need to use matched reagents in order to comply with FDA requirements for endotoxin testing. Each Lonza LAL lot is tested for functionality using United States Reference Standard EC-7. We then match this LAL lot to a lot of our Control...

When preparing to run a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection kit how is the potency of CSE determined?

The RSE/CSE procedure used by Lonza to determine CSE potency is found on the Certificate of Analysis for each matched kit. In general, dilutions of endotoxin from multiple vials of CSE are tested unknowns compared to a series of standards produced...

When performing a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection assay how should I handle the LAL reagent?

Lonza LAL reagent should be handled gently. After reconstitution, the contents of the vial will easily go into solution by either gently inverting or swirling the vial. Vortexing or vigorously shaking the reconstituted LAL reagent will cause it to...

When performing a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection assay how should I prepare my sample for testing?

There are a few ways in which your sample can be prepared before testing it. Most samples only need to be diluted before they are tested with one of our endotoxin detection kits. In order to determine how far out you should dilute your sample, you...

When performing a Lonza Bacterial Endotoxin Test (BET), LAL or PyroGene™ Recombinant Factor C (rFC), endotoxin detection assay what pH should my sample be? What should I adjust it with?

Our endotoxin detection assays are optimized to work with samples with a pH range of 6-8. If the pH of your sample falls outside of this range you can adjust it with a buffer, or HCl or NaOH. Make sure the buffer you are using is endotoxin free by...

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