RT Journal Article T1 Pleiotropic Role of Rainbow Trout CXCRs in Response to Disease and Environment: Insights from Transcriptional Signatures and Structure Analysis A1 Hou, Zhi-Shuai A1 Zhao, Hong-Kui A1 Perdiguero Jiménez, Pedro A1 Liu, Meng-Qun A1 Xiang, Kai-Wen A1 Zeng, Chu A1 Li, Zhao A1 Yang, Xiao-Dong A1 Yang, Qian A1 Xin, Yuan-Ru A1 Li, Ji-Fang A1 Tafalla, Carolina A1 Wen, Hai-Shen AB Chemokines are cytokines with chemoattractant capacities that exert their physiological functions through the binding of chemokine receptors. Thus, chemokine and receptor complexes exert important roles in regulating development and homeostasis during routine immune surveillance and inflammation. Compared to mammals, the physiology and structure of chemokine receptors in fish have not been systematically studied. Furthermore, the salmonid-specific whole genome duplication has significantly increased the number of functional paralogs of chemokine receptors. In this context, in the current study, trout exhibited 17 cxcr genes, including 12 newly identified and 5 previously identified receptors. Interestingly, gene expression of brain cxcr1 and cxcr4, kidney cxcr3 and cxcr4, and spleen cxcr3, cxcr4, and cxcr5 subtypes were altered by bacterial infection, whereas brain cxcr1, kidney cxcr1 and cxcr7, and liver cxcr2, cxcr3, and cxcr4 subtypes were changed in response to environmental changes. Based on protein structures predicted by ColabFold, the conserved amino acids in binding pockets between trout CXCR4.1 subtypes and human CXCR4 were also analyzed. Our study is valuable from a comparative point of view, providing new insights into the identification and physiology of salmonid chemokine receptors. PB MDPI SN 2218-273X YR 2024 FD 2024-03-12 LK https://hdl.handle.net/20.500.14352/119072 UL https://hdl.handle.net/20.500.14352/119072 LA eng NO Hou, Z.-S.; Zhao, H.-K.; Perdiguero, P.; Liu, M.-Q.; Xiang, K.-W.; Zeng, C.; Li, Z.; Yang, X.-D.; Yang, Q.; Xin, Y.-R.; et al. Pleiotropic Role of Rainbow Trout CXCRs in Response to Disease and Environment: Insights from Transcriptional Signatures and Structure Analysis. Biomolecules 2024, 14, 337. https://doi.org/10.3390/biom14030337 NO This research was funded by the Natural Science Foundation of Shandong Province (ZR2023QC196), China Postdoctoral Science Foundation (2023M743332), Development Plan of Youth innovation team in colleges and universities in Shandong Province (2023KJ031), Qingdao Postdoctoral Science Foundation (QDBSH20230102021), Foundation of Guangxi Academy of Aquatic Sciences (GXKEYLA-2023-01-21) and Support Foundation of Ocean University of China. NO Natural Science Foundation of Shandong Province (China) NO China Postdoctoral Science Foundation NO Youth Innovation Team Development Plan of Shandong Colleges and Universities NO Qingdao Postdoctoral Science Foundation NO Foundation of Guangxi Academy of Aquatic Sciences NO Ocean University of China DS Docta Complutense RD 5 abr 2025