| 1. |
- Bendes, Annika, et al.
(författare)
-
Bead-Based Assays for Validating Proteomic Profiles in Body Fluids
- 2021
-
Ingår i: Protein Microarrays for Disease Analysis. - New York, NY : Springer Nature. ; , s. 65-78
-
Bokkapitel (refereegranskat)abstract
- Protein biomarkers in biological fluids represent an important resource for improving the clinical management of diseases. Current proteomics technologies are capable of performing high-throughput and multiplex profiling in different types of fluids, often leading to the shortlisting of tens of candidate biomarkers per study. However, before reaching any clinical setting, these discoveries require thorough validation and an assay that would be suitable for routine analyses. In the path from biomarker discovery to validation, the performance of the assay implemented for the intended protein quantification is extremely critical toward achieving reliable and reproducible results. Development of robust sandwich immunoassays for individual candidates is challenging and labor and resource intensive, and multiplies when evaluating a panel of interesting candidates at the same time. Here we describe a versatile pipeline that facilitates the systematic and parallel development of multiple sandwich immunoassays using a bead-based technology.
|
|
| 2. |
- Hauser, Janosch, et al.
(författare)
-
On-Chip Assay for Home-Sampling, Mail-Based Shipping and Centralized Laboratory Readout
- 2021
-
Ingår i: MicroTAS 2021. - : Chemical and Biological Microsystems Society. ; , s. 807-808
-
Konferensbidrag (refereegranskat)abstract
- On-chip immunoassays have great potential to accelerate point-of-care (POC) testing. However, most attempts require either impractical readout equipment or are outperformed by the sensitivity, reliability and affordability offered by centralized laboratories. Here, we present a capillary-driven microfluidic device that unites the best of two worlds: Bead-based analyte isolation at the POC, where analyte drying enables simple mail-based shipping, combined with the powerful capabilities of centralized laboratories. Using C-reactive protein (CRP) as model biomarker we demonstrate on-chip assay performance similar to conventional assays, with a LOD of 10 pg/ml and average CV of 9.7 % (48 microfluidic devices).
|
|
| 3. |
- Roxhed, Niclas, et al.
(författare)
-
Multianalyte serology in home-sampled blood enables an unbiased assessment of the immune response against SARS-CoV-2
- 2021
-
Ingår i: Nature Communications. - : Springer Nature. - 2041-1723. ; 12:1
-
Tidskriftsartikel (refereegranskat)abstract
- Serological testing is essential to curb the consequences of the COVID-19 pandemic. However, most assays are still limited to single analytes and samples collected within healthcare. Thus, we establish a multianalyte and multiplexed approach to reliably profile IgG and IgM levels against several versions of SARS-CoV-2 proteins (S, RBD, N) in home-sampled dried blood spots (DBS). We analyse DBS collected during spring of 2020 from 878 random and undiagnosed individuals from the population in Stockholm, Sweden, and use classification approaches to estimate an accumulated seroprevalence of 12.5% (95% CI: 10.3%-14.7%). This includes 5.4% of the samples being IgG(+)IgM(+) against several SARS-CoV-2 proteins, as well as 2.1% being IgG(-)IgM(+) and 5.0% being IgG(+)IgM(-) for the virus' S protein. Subjects classified as IgG(+) for several SARS-CoV-2 proteins report influenza-like symptoms more frequently than those being IgG(+) for only the S protein (OR=6.1; p<0.001). Among all seropositive cases, 30% are asymptomatic. Our strategy enables an accurate individual-level and multiplexed assessment of antibodies in home-sampled blood, assisting our understanding about the undiagnosed seroprevalence and diversity of the immune response against the coronavirus. Here, Roxhed et al. develop a multiplexed approach to screen IgG and IgM levels against several SARS-CoV-2 proteins in home-sampled dried blood spots and estimate seroprevalence of 12.5% in Stockholm in spring of 2020.
|
|
