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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Allergy+Clin+Immunol
2017 ; 139
(3
): 889-899.e11
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Assessing basophil activation by using flow cytometry and mass cytometry in blood
stored 24 hours before analysis
#MMPMID27527263
Mukai K
; Gaudenzio N
; Gupta S
; Vivanco N
; Bendall SC
; Maecker HT
; Chinthrajah RS
; Tsai M
; Nadeau KC
; Galli SJ
J Allergy Clin Immunol
2017[Mar]; 139
(3
): 889-899.e11
PMID27527263
show ga
BACKGROUND: Basophil activation tests (BATs) have promise for research and for
clinical monitoring of patients with allergies. However, BAT protocols vary in
blood anticoagulant used and temperature and time of storage before testing,
complicating comparisons of results from various studies. OBJECTIVE: We attempted
to establish a BAT protocol that would permit analysis of blood within 24 hours
of obtaining the sample. METHODS: Blood from 46 healthy donors and 120 patients
with peanut allergy was collected into EDTA or heparin tubes, and samples were
stored at 4°C or room temperature for 4 or 24 hours before performing BATs.
RESULTS: Stimulation with anti-IgE or IL-3 resulted in strong upregulation of
basophil CD203c in samples collected in EDTA or heparin, stored at 4°C, and
analyzed 24 hours after sample collection. However, a CD63(hi) population of
basophils was not observed in any conditions in EDTA-treated samples unless
exogenous calcium/magnesium was added at the time of anti-IgE stimulation. By
contrast, blood samples collected in heparin tubes were adequate for
quantification of upregulation of basophil CD203c and identification of a
population of CD63(hi) basophils, irrespective of whether the specimens were
analyzed by means of conventional flow cytometry or cytometry by time-of-flight
mass spectrometry, and such tests could be performed after blood was stored for
24 hours at 4°C. CONCLUSION: BATs to measure upregulation of basophil CD203c and
induction of a CD63(hi) basophil population can be conducted with blood obtained
in heparin tubes and stored at 4°C for 24 hours.