PMID- 24509065 OWN - NLM STAT- MEDLINE DCOM- 20141204 LR - 20140407 IS - 1879-0089 (Electronic) IS - 0145-305X (Linking) VI - 45 IP - 1 DP - 2014 Jul TI - Fish granulocytes express a constitutively active androgen receptor variant. PG - 115-22 LID - S0145-305X(14)00031-7 [pii] LID - 10.1016/j.dci.2014.01.024 [doi] AB - In humans, alternative splicing of androgen receptor (AR) is usually involved in some diseases. However, our knowledge about the presence of AR variants in other species and its importance for immunity is scant. Here, we report the identification of a constitutively active AR variant lacking the ligand-binding domain (LBD), ARDeltaLBD, in the fish gilthead seabream. ARDeltaLBD is expressed in the testis and the head-kidney (HK), and its expression varies with the reproductive stage and is correlated with plasma testosterone (T). In addition, ARDeltaLBD is expressed in acidophilic granulocytes (AGs), which are the functional equivalent of mammalian neutrophils, but not in macrophages, and its expression is modulated by both T and immune stimuli. Notably, AR and ARDeltaLBD were able to interact, being the activity of AR dominant at all concentrations tested of the ligand. These results reveal a new mechanism for the regulation of neutrophil biology in vertebrates and explain the conflicting results that suggest that androgens are less important than AR in human and mouse neutrophil homeostasis. CI - Copyright (c) 2014 Elsevier Ltd. All rights reserved. FAU - Sanchez-Hernandez, Miriam AU - Sanchez-Hernandez M AD - Centro Oceanografico de Murcia, Instituto Espanol de Oceanografia (IEO), Carretera de la Azohia s/n, Puerto de Mazarron, 30860 Murcia, Spain. FAU - Arizcun, Marta AU - Arizcun M AD - Centro Oceanografico de Murcia, Instituto Espanol de Oceanografia (IEO), Carretera de la Azohia s/n, Puerto de Mazarron, 30860 Murcia, Spain. FAU - Garcia-Alcazar, Alicia AU - Garcia-Alcazar A AD - Centro Oceanografico de Murcia, Instituto Espanol de Oceanografia (IEO), Carretera de la Azohia s/n, Puerto de Mazarron, 30860 Murcia, Spain. FAU - Sarropoulou, Elena AU - Sarropoulou E AD - Institute of Marine Biology and Genetics, Hellenic Center for Marine Research, Crete, Greece. FAU - Mulero, Victoriano AU - Mulero V AD - Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain. Electronic address: vmulero@um.es. FAU - Garcia-Ayala, Alfonsa AU - Garcia-Ayala A AD - Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, 30100 Murcia, Spain. Electronic address: agayala@um.es. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140206 PL - United States TA - Dev Comp Immunol JT - Developmental and comparative immunology JID - 7708205 RN - 0 (Fish Proteins) RN - 0 (Protein Isoforms) RN - 0 (Receptors, Androgen) RN - 3XMK78S47O (Testosterone) SB - IM MH - Animals MH - Cells, Cultured MH - Fish Proteins/genetics/*metabolism MH - Gene Expression MH - Granulocytes/*metabolism MH - HEK293 Cells MH - Head Kidney/cytology MH - Humans MH - Male MH - Protein Isoforms/genetics/metabolism MH - Receptors, Androgen/genetics/*metabolism MH - Sea Bream/*anatomy & histology/metabolism MH - Testis/metabolism MH - Testosterone/blood MH - Transcriptional Activation OTO - NOTNLM OT - Alternative splicing OT - Androgen receptor OT - Gilthead seabream OT - Leukocytes OT - Testis OT - Testosterone EDAT- 2014/02/11 06:00 MHDA- 2014/12/15 06:00 CRDT- 2014/02/11 06:00 PHST- 2013/11/25 00:00 [received] PHST- 2014/01/27 00:00 [revised] PHST- 2014/01/30 00:00 [accepted] PHST- 2014/02/11 06:00 [entrez] PHST- 2014/02/11 06:00 [pubmed] PHST- 2014/12/15 06:00 [medline] AID - S0145-305X(14)00031-7 [pii] AID - 10.1016/j.dci.2014.01.024 [doi] PST - ppublish SO - Dev Comp Immunol. 2014 Jul;45(1):115-22. doi: 10.1016/j.dci.2014.01.024. Epub 2014 Feb 6.