Humoral signals mediate the circadian expression of rat period homologue (rPer2) mRNA in peripheral tissues.
Northern blot analysis revealed the circadian expression of rat period homologue (rPer2) mRNA in peripheral mononuclear leukocytes that have no neuronal connections. The mRNA expression in the suprachiasmatic nucleus (SCN), peripheral mononuclear leukocytes, and other peripheral tissues exhibited prominent, synchronous circadian oscillation with peaks at early night. As we have previously shown the peripheral circadian expression of rPer2 mRNA is abolished in SCN-lesioned rats [Sakamoto, K., Nagase, T. Fukui, H., Horikawa, K., Okada, T., Tanaka, H., Sato, K., Miyake, Y., Ohara, O., Kako, K. and Ishida, N., J. Biol. Chem., 273 (1998) 27039-27042], our findings suggest that some humoral signals, driven by the SCN, mediate the circadian expression of mammalian per homologues in peripheral tissues.
Oishi
K
K
Ishida Group of Clock Gene, National Institute of Bioscience and Human Technology, Agency of Industrial Science and Technology, Tsukuba, Ibaraki, Japan.
Sakamoto
K
K
Okada
T
T
Nagase
T
T
Ishida
N
N
D000818:Animals; D015152:Blotting, Northern; D018797:Cell Cycle Proteins; D002940:Circadian Rhythm; D005786:Gene Expression Regulation; D007963:Leukocytes, Mononuclear / Q000378:metabolism*; D008168:Lung / Q000378:metabolism; D008297:Male; D009206:Myocardium / Q000378:metabolism; D009687:Nuclear Proteins / Q000235:genetics*; D009928:Organ Specificity; D056950:Period Circadian Proteins; D012333:RNA, Messenger / Q000096:biosynthesis; D051381:Rats; D017208:Rats, Wistar; D013493:Suprachiasmatic Nucleus / Q000378:metabolism*; D013997:Time Factors; D014157:Transcription Factors
D018797:Cell Cycle Proteins; D009687:Nuclear Proteins; C513311:Per2 protein, rat; D056950:Period Circadian Proteins; D012333:RNA, Messenger; D014157:Transcription Factors