PMID- 23662898 OWN - NLM STAT- MEDLINE DCOM- 20131115 LR - 20211021 IS - 1940-9818 (Electronic) IS - 0736-6205 (Print) IS - 0736-6205 (Linking) VI - 54 IP - 5 DP - 2013 May TI - Pairwise agonist scanning-flow cytometry (PAS-FC) measures inside-out signaling and patient-specific response to combinatorial platelet agonists. PG - 271-7 LID - 10.2144/000114027 [doi] AB - Understanding the response of cells to multiple stimuli is vital for predicting donor specific responses and better understanding the signaling pathways involved. This is of particular importance in platelets because exposure of phosphatidylserine (PS) occurs upon costimulation but not with a single agonist. Here, we describe a multiplexed pairwise agonist scanning-flow cytometry (PAS-FC) method of measuring platelet inside-out responses to all pairs of six platelet agonists (convulxin, SFLLRN, AYPGKF, ADP, U46619, and PGE(2)) used at their EC(50) concentrations. These agonists allowed exploration of platelet signaling downstream of GPVI, PAR-1, PAR-4, P2Y(1), P2Y(12), TP, and IP receptors. The three-color flow cytometry method simultaneously measured integrin alpha(IIb)beta(3) activation with PAC-1 antibody, P-selectin exposure (via alpha granule release) with anti-P-selectin, and PS exposure with annexin V. These responses were consistent across a healthy male donor pool. In duplicate measurements with each donor, 4 of the 10 donors had a sufficiently unique 45-parameter (15 pairs x 3 colors) phenotype to self-cluster (P < 0.001). This method has the potential for efficiently scanning for patient specific responses across a broad agonist-receptor space. FAU - Jaeger, Daniel T L AU - Jaeger DT AD - Institute for Medicine and Engineering, Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA, USA. FAU - Diamond, Scott L AU - Diamond SL LA - eng GR - R01 HL103419/HL/NHLBI NIH HHS/United States GR - R01 HL-103419/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - England TA - Biotechniques JT - BioTechniques JID - 8306785 RN - 0 (Annexin A5) RN - 0 (Crotalid Venoms) RN - 0 (Lectins, C-Type) RN - 0 (Oligopeptides) RN - 0 (P-Selectin) RN - 0 (Peptide Fragments) RN - 0 (Phosphatidylserines) RN - 0 (alanyl-tyrosyl-prolyl-glycyl-lysyl-phenylalanine) RN - 0 (thrombin receptor peptide (42-47)) RN - 37206-04-5 (convulxin) RN - 61D2G4IYVH (Adenosine Diphosphate) RN - 76898-47-0 (15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid) RN - K7Q1JQR04M (Dinoprostone) SB - IM MH - 15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid/pharmacology MH - Adenosine Diphosphate/pharmacology MH - Annexin A5/chemistry/metabolism MH - Blood Donors MH - Blood Platelets/chemistry/cytology/*drug effects/metabolism MH - Cluster Analysis MH - Crotalid Venoms/pharmacology MH - Dinoprostone/pharmacology MH - Flow Cytometry/*methods MH - Humans MH - Lectins, C-Type MH - Male MH - Oligopeptides/pharmacology MH - P-Selectin/chemistry/metabolism MH - Peptide Fragments/pharmacology MH - Phenotype MH - Phosphatidylserines MH - Precision Medicine MH - Signal Transduction PMC - PMC4086368 MID - NIHMS599833 COIS- Competing Interests The authors declare no competing interests. EDAT- 2013/05/15 06:00 MHDA- 2013/11/16 06:00 PMCR- 2014/07/08 CRDT- 2013/05/14 06:00 PHST- 2013/01/29 00:00 [received] PHST- 2013/04/22 00:00 [accepted] PHST- 2013/05/14 06:00 [entrez] PHST- 2013/05/15 06:00 [pubmed] PHST- 2013/11/16 06:00 [medline] PHST- 2014/07/08 00:00 [pmc-release] AID - 000114027 [pii] AID - 10.2144/000114027 [doi] PST - ppublish SO - Biotechniques. 2013 May;54(5):271-7. doi: 10.2144/000114027.