title: Expression of mRNA for multiple serotonin (5-HT) receptor types/subtypes by the peripheral blood mononuclear cells of rhesus macaques.
abstract: To find out whether rhesus macaque peripheral blood mononuclear cells (PBMCs) express mRNA for 5-HT receptors, blood samples from normal healthy rhesus monkeys were used to isolate PBMCs by Ficoll-paque density gradient centrifugation. Total RNA was extracted from MT-2 cells, Hut-78 cells, naive or phytohemagglutinin (PHA) stimulated human and monkey PBMCs. One tube RT-PCR was performed using primers specific for human 5-HT1A, 5-HT1B, 5-HT1E, 5-HT2A, 5-HT2B, 5-HT2C, 5-HT3, 5-HT4, 5-HT6, and 5-HT7 receptors. Amplicons of expected sizes were obtained from human cell lines as well as both human and monkey PBMCs. Both PHA stimulated human and monkey PBMCs express mRNAs for 5-HT1A, 5-HT1B, 5-HT1E, 5-HT2A, 5-HT3, 5-HT4, 5-HT6 receptor types/subtypes. However, mRNAs for 5-HT1B, 5-HT1E and 5-HT2A cannot be confidently detected in some of the PBMC samples without PHA stimulation. 5-HT2B and 5-HT7 receptor mRNA was not detected in most of the samples and 5-HT2C receptor mNRA was not detected at all. FACS analysis revealed that CD3+ lymphocyte increased more than 20% among lymphocytes in the PHA stimulated PBMCs. These data indicate that similar to human PBMC, rhesus macaque PBMC may express multiple types of 5-HT receptors and the expression profile could change after PHA stimulation due to either the changes in cell composition or changes in gene transcription level. This provided a basis for further studies on the neuroimmunomodulatory interactions of 5-HT in rhesus macaques.
authors.affiliation: State Key Laboratory for Infectious Disease Prevention and Control, People's Republic of China. guibyang@public.bta.net.cn
authors.forename: Gui-Bo
authors.initials: GB
authors.lastname: Yang
authors.forename: Chen-Li
authors.initials: CL
authors.lastname: Qiu
authors.forename: Hui
authors.initials: H
authors.lastname: Zhao
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Yiming
authors.initials: Y
authors.lastname: Shao
mesh_terms: D000818:Animals; D002460:Cell Line; D005434:Flow Cytometry; D015870:Gene Expression / Q000276:immunology*; D006098:Granulocytes / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D007963:Leukocytes, Mononuclear / Q000187:drug effects / Q000378:metabolism*; D008214:Lymphocytes / Q000187:drug effects / Q000378:metabolism; D008253:Macaca mulatta; D008934:Mitogens / Q000494:pharmacology; D009000:Monocytes / Q000187:drug effects / Q000378:metabolism; D010835:Phytohemagglutinins / Q000494:pharmacology; D012333:RNA, Messenger / Q000032:analysis*; D011985:Receptors, Serotonin / Q000096:biosynthesis*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D008934:Mitogens; D010835:Phytohemagglutinins; D012333:RNA, Messenger; D011985:Receptors, Serotonin; C078730:serotonin 5 receptor