Mechanisms of AllergyRetinoic acid modulates IL-5 receptor expression and selectively inhibits eosinophil-basophil differentiation of hemopoietic progenitor cells☆,☆☆,★
Section snippets
Materials
Materials were purchased as follows: Lymphoprep was obtained from NycoMed Pharma AS; McCoys 5A medium, penicillin, streptomycin, and FCS were obtained from Gibco BRL; heparin, dextran (molecular weight, 260,000 kD), sodium azide, ATRA, and paraformaldehyde were obtained from Sigma Aldrich Canada; 2-mercaptoethanol was obtained from BDH Inc; recombinant IL-3, IL-5, and GM-CSF were obtained from Pharmingen Canada; and methylcellulose (Methocel A4M premium) was obtained from Dow Chemicals. The
ATRA selectively inhibits eosinophil-basophil CFUs
In initial experiments sternal bone marrow samples were obtained preoperatively from patients undergoing cardiac surgery, and CFUs were enumerated in 14-day methylcellulose-based assays, with Mo-conditioned medium as a source of GM-CSF. Data are expressed as CFUs per 2.5 × 105 nonadherent bone marrow cells. As shown in Fig 1, ATRA (10−6 mol/L) reduced eosinophil-basophil CFUs from 21 ± 5.9 to 9.25 ± 2.7 colonies (P < .05), associated with no significant change in the proportion of
Discussion
Our findings demonstrate that ATRA has the ability to selectively inhibit eosinophil-basophil differentiation and surface expression of IL-5Rα by hemopoietic progenitor cells in vitro. First, ATRA suppressed bone marrow eosinophil-basophil CFUs but had no effect on granulocyte-macrophage CFUs (Fig 1). Second, ATRA suppressed eosinophil-basophil differentiation of CD34+ cord blood cells in long-term liquid culture, whereas neutrophil differentiation proceeded without impediment (Table I).
Acknowledgements
We thank Dr A. Lopez (Adelaide, Australia) for generous provision of antibodies, A. Verhee (Ghent, Belgium) for technical assistance, and Lynne Larocque for excellent help in manuscript preparation.
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Cited by (24)
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2018, International ImmunopharmacologyCitation Excerpt :We found that patients treated with ATRA and Ipilimumab had a significantly lower frequency of eosinophils in the periphery compared to people treated with Ipilimumab alone. This is consistent with previous literature showing that ATRA reduces the expression of IL-5 receptor on eosinophil progenitor cells, resulting in decreased differentiation of eosinophils [41]. There have been few reports in the literature in regard to the impact of eosinophils in patients being treated with Ipilimumab.
Novel lineage- and stage-selective effects of retinoic acid on mouse granulopoiesis: Blockade by dexamethasone or inducible NO synthase inactivation
2017, International ImmunopharmacologyCitation Excerpt :The following aspects require further elaboration: Our findings differ strikingly from those of a single report of ATRA effects on normal (nonleukemic) human hemopoietic progenitors in eosinopoiesis [39], which describes a suppressive effect of ATRA on the expression of IL-5 receptor α chain, while GM-CSF receptor α chain expression was unaffected. In that study, IL-5-stimulated eosinophil colony formation was reduced in the presence of ATRA, while GM-CSF-stimulated myeloid colony formation was not (a major difference relative to our results).
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2014, Allergology InternationalVitamin A reduces lung granulomatous inflammation with eosinophilic and neutrophilic infiltration in Sephadex-treated rats
2004, European Journal of PharmacologyGene microarray analysis reveals interleukin-5-dependent transcriptional targets in mouse bone marrow
2004, BloodCitation Excerpt :Among the genes undergoing the most prominent alterations in expression are Syntaxin 3 (+8-fold), which has been identified as a component of the eosinophil exocytotic apparatus,33 the signal transduction elements phospholipase D1 (–34-/–2.1-fold), syk (–27-fold) which is intriguing, given the role of syk in IL-5–mediated eosinophil activation.34 Also undergoing transcriptional alteration is the retinoic acid receptor (–14-fold), an interesting parallel given that its ligand, retinoic acid, has been shown to modulate expression of the receptor for IL-5.35 Many genes that are traditionally associated with eosinophil development and differentiation were either not detected or did not respond within the patterns defined by profiles 1 or 2 in Figure 3 (Table 2).
Retinoic acid inhibits in vitro development of mast cells but has no marked effect on mature human skin tryptase- and chymase-positive mast cells
2003, Journal of Investigative DermatologyCitation Excerpt :The AML14 leukemic cell line, which can differentiate into eosinophils, is induced by RA to neutrophil differentiation (Paul et al, 1995). Furthermore, RA inhibits the development of eosinophils and basophils, but not neutrophils and macrophages, from human bone marrow or cord blood (Upham et al, 2002). Taken together, these results suggest that RA promotes the differentiation of neutrophils and monocytes whereas the development of erythrocytes, eosinophils, basophils, and mast cells is suppressed.
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*Dr Upham is currently affiliated with the University Department of Medicine, QE2 Medical Centre, Nedlands, Australia.
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Supported by grants from the Medical Research Council of Canada. J.W.U. is the recipient of a Neil Hamilton Fairley Fellowship (#967211) from the National Health & Medical Research Council of Australia.
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Reprint requests: Judah A. Denburg, MD, Department of Medicine, HSC 3V46, McMaster University, 1200 Main St West, Hamilton, Ontario L8N 3Z5, Canada.