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Lineage- CD34hi CD117int/hi FcϵRI+ cells in human blood constitute a rare population of mast cell progenitors
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinsk biokemi och mikrobiologi.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinska vetenskaper, Klinisk fysiologi.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinsk biokemi och mikrobiologi.
Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinska vetenskaper.
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2016 (engelsk)Inngår i: Blood, ISSN 0006-4971, E-ISSN 1528-0020, Vol. 127, nr 4, s. 383-391Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Mast cells are rare tissue-resident immune cells that are involved in allergic reactions, and their numbers are increased in the lungs of asthmatics. Murine lung mast cells arise from committed bone marrow-derived progenitors that enter the blood circulation, migrate through the pulmonary endothelium, and mature in the tissue. In humans, mast cells can be cultured from multipotent CD34(+) progenitor cells. However, a population of distinct precursor cells that give rise to mast cells has remained undiscovered. To our knowledge, this is the first report of human lineage(-) CD34(hi) CD117(int/hi) FcϵRI(+) progenitor cells, which represented only 0.0053% of the isolated blood cells in healthy individuals. These cells expressed integrin β7 and developed a mast cell-like phenotype, although with a slow cell division capacity in vitro. Isolated lineage(-) CD34(hi) CD117(int/hi) FcϵRI(+) blood cells had an immature mast cell-like appearance and expressed high levels of many mast cell-related genes as compared with human blood basophils in whole-transcriptome microarray analyses. Furthermore, serglycin, tryptase, and carboxypeptidase A mRNA transcripts were detected by quantitative RT-PCR. Altogether, we propose that the lineage(-) CD34(hi) CD117(int/hi) FcϵRI(+) blood cells are closely related to human tissue mast cells and likely constitute an immediate precursor population, which can give rise to predominantly mast cells. Furthermore, asthmatics with reduced lung function had a higher frequency of lineage(-) CD34(hi) CD117(int/hi) FcϵRI(+) blood mast cell progenitors than asthmatics with normal lung function.

sted, utgiver, år, opplag, sider
2016. Vol. 127, nr 4, s. 383-391
HSV kategori
Identifikatorer
URN: urn:nbn:se:uu:diva-270369DOI: 10.1182/blood-2015-06-650648ISI: 000369288300007PubMedID: 26626992OAI: oai:DiVA.org:uu-270369DiVA, id: diva2:889628
Tilgjengelig fra: 2015-12-27 Laget: 2015-12-27 Sist oppdatert: 2017-12-01

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