| Title |
Development and Validation of Electrochemiluminescence Assays to Measure Free and Total sSLAMF7 in Human Serum in the Absence and Presence of Elotuzumab
|
|---|---|
| Published in |
The AAPS Journal, April 2016
|
| DOI | 10.1208/s12248-016-9912-3 |
| Pubmed ID | |
| Authors |
Jennifer Postelnek, Robert J. Neely, Michael D. Robbins, Carol R. Gleason, Jon E. Peterson, Steven P. Piccoli |
| Abstract |
Elotuzumab is a first in class humanized IgG1 monoclonal antibody for the treatment of multiple myeloma (MM). Elotuzumab targets the glycoprotein signaling lymphocyte activation molecule family 7 (SLAMF7, also described as CS1 or CRACC) which is expressed on the surface of myeloma cells and a subset of immune cells, including natural killer cells. A soluble version of SLAMF7 (sSLAMF7) has also been reported in MM patients but has not been evaluated as a potential biomarker following therapeutic intervention. In order to measure serum levels of sSLAMF7, two immunoassays were developed to monitor changes in circulating sSLAMF7 before and after elotuzumab treatment. Free (drug-unbound) and total (drug-bound and unbound) electrochemiluminescence (ECL) ELISA assays were developed and validated following a fit for purpose (FFP) methodology. Both assays met analytical acceptance criteria for precision, drug interference, dilution linearity, spike recovery, parallelism, and stability. Both exhibited the range and sensitivity necessary to measure clinical samples with an LLOQ of 51.2 pg/mL and ULOQs of 160 (free) and 800 ng/mL (total). Previously described assays were unable to detect sSLAMF7 in healthy individuals. However, due to the increased sensitivity of these new assays, low but measurable sSLAMF7 levels were detected in all normal healthy sera evaluated and were significantly elevated in MM patients. Cohort statistics revealed a significant increase of circulating sSLAMF7 in MM patients versus normal controls and both significant decreases in free and increases in total levels of protein post-elotuzumab treatment. |
X Demographics
The data shown below were collected from the profiles of 2 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 50% |
| Unknown | 1 | 50% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 2 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 12 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 12 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 3 | 25% |
| Other | 1 | 8% |
| Lecturer | 1 | 8% |
| Student > Bachelor | 1 | 8% |
| Student > Doctoral Student | 1 | 8% |
| Other | 2 | 17% |
| Unknown | 3 | 25% |
| Readers by discipline | Count | As % |
|---|---|---|
| Biochemistry, Genetics and Molecular Biology | 3 | 25% |
| Pharmacology, Toxicology and Pharmaceutical Science | 2 | 17% |
| Medicine and Dentistry | 2 | 17% |
| Immunology and Microbiology | 1 | 8% |
| Veterinary Science and Veterinary Medicine | 1 | 8% |
| Other | 0 | 0% |
| Unknown | 3 | 25% |
Attention Score in Context
This research output has an Altmetric Attention Score of 11. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 01 July 2016.
All research outputs
#2,827,966
of 22,865,319 outputs
Outputs from The AAPS Journal
#100
of 1,287 outputs
Outputs of similar age
#46,892
of 298,924 outputs
Outputs of similar age from The AAPS Journal
#5
of 37 outputs
Altmetric has tracked 22,865,319 research outputs across all sources so far. Compared to these this one has done well and is in the 87th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 1,287 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.0. This one has done particularly well, scoring higher than 91% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 298,924 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 84% of its contemporaries.
We're also able to compare this research output to 37 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 81% of its contemporaries.