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dc.contributor.authorAcosta-Andrade, Carlos
dc.contributor.authorLambertos, Ana
dc.contributor.authorUrdiales-Ruiz, Jose Luis 
dc.contributor.authorSanchez-Jimenez, Francisca Maria 
dc.contributor.authorPeñafiel, Rafael
dc.contributor.authorFajardo-Paredes, Ignacio José 
dc.date.accessioned2015-09-04T09:38:00Z
dc.date.available2015-09-04T09:38:00Z
dc.date.created2015
dc.date.issued2015-09-04
dc.identifier.urihttp://hdl.handle.net/10630/10211
dc.description.abstractPolyamines (putrescine, spermidine and spermine; PAs) are essential for the majority of living cells. Antizymes and antizyme inhibitors are key regulatory proteins of PA levels by affecting ornithine decarboxylase and PA uptake. In addition to PAs, mast cells (MC) synthesize and store in their granules histamine (Hia) and serotonin (5-HT), which are critical for their function. Our previous studies have indicated a metabolic interplay among PAs, Hia and 5-HT in this cell type. For instance, we showed that PAs affect Hia synthesis during early stages of IL-3-induced bone marrow cell differentiation into bone marrow derived MCs (BMMCs) and demonstrated that PAs are present in MC secretory granules and are important for granule homeostasis, including Hia storage and 5-HT levels. A few years ago, a novel antizyme inhibitor (AZIN2) was described whose expression is restricted to a few tissues and cell types including brain, testis and MCs. In MCs, it was recently proposed that AZIN2 could act as a local regulator of PA biosynthesis in association with 5-HT-containing granules and with 5-HT release following MC activation. To gain insight into the role of AZIN2 in the biosynthesis and storage of 5-HT and also Hia, we have generated BMMCs from both wild-type and transgenic mice with severe Azin2 hypomorphism, and have analyzed the content of PAs, 5-HT and Hia, and some elements of their metabolisms. Spermine and 5-HT levels were reduced in Azin2 hypomorphic BMMCs compared with wild-type controls, whereas the amount of Hia was increased. Accordingly, the level of tryptophan hydroxylase 1 (the key enzyme for 5-HT biosynthesis) was reduced and the amount of enzymatic activity of histidine decarboxylase (the enzyme responsible for Hia biosynthesis) was increased in Azin2 hypomorphic BMMCs. Taken together, our results show evidence that AZIN2 has an important role in the regulation of 5-HT and Hia biosynthesis and storage in MCses_ES
dc.description.sponsorshipUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. This work was supported by SAF2011-26518 (MINECO, Spain) and P10-CVI-6585 and Bio-267 (Junta de Andalucia, Spain). CIBERER is an iniciative of Instituto de Salud Carlos III (Spain).es_ES
dc.language.isoenges_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectPoliaminases_ES
dc.subject.otherMastocitoses_ES
dc.subject.otherHistaminaes_ES
dc.subject.otherSerotoninaes_ES
dc.titleA role for antizyme inhibitor 2 in the biosynthesis and content of serotonin and histamine in mouse mast cellses_ES
dc.typeinfo:eu-repo/semantics/conferenceObjectes_ES
dc.centroFacultad de Cienciases_ES
dc.relation.eventtitle14th International Congress on Amino Acids, Peptides and Proteinses_ES
dc.relation.eventplaceViena, Austriaes_ES
dc.relation.eventdate2 de agosto de 2015es_ES
dc.cclicenseby-nc-ndes_ES


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