Variance in multiplex suspension array assays: Microsphere size variation impact

Brian P. Hanley, Li Xing, R. Holland Cheng

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Background. Luminex suspension microarray assays are in widespread use. There are issues of variability of assay readings using this technology. Methods and results. Size variation is demonstrated by transmission electron microscopy. Size variations of microspheres are shown to occur in stepwise increments. A strong correspondence between microsphere size distribution and distribution of fluorescent events from assays is shown. An estimate is made of contribution of microsphere size variation to assay variance. Conclusion. A probable significant cause of variance in suspended microsphere assay results is variation in microsphere diameter. This can potentially be addressed by changes in the manufacturing process. Provision to users of mean size, median size, skew, the number of standard deviations that half the size range represents (sigma multiple), and standard deviation is recommended. Establishing a higher sigma multiple for microsphere production is likely to deliver a significant improvement in precision of raw instrument readings. Further research is recommended on the molecular architecture of microsphere coatings.

Original languageEnglish (US)
Article number31
JournalTheoretical Biology and Medical Modelling
Volume4
DOIs
StatePublished - 2007

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Microspheres
Assays
Suspensions
Standard deviation
Reading
Transmission Electron Microscopy
Microarrays
Probable
Microarray
Skew
Increment
Coating
Correspondence
Manufacturing
Likely
Transmission electron microscopy
Technology
Coatings
Research
Estimate

ASJC Scopus subject areas

  • Health Informatics
  • Medicine(all)

Cite this

Variance in multiplex suspension array assays : Microsphere size variation impact. / Hanley, Brian P.; Xing, Li; Cheng, R. Holland.

In: Theoretical Biology and Medical Modelling, Vol. 4, 31, 2007.

Research output: Contribution to journalArticle

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