Animals 4 Circadian Rhythm 4 PER1 protein animal experiment 4 animal tissue 4 circadian rhythm 4 controlled study 4 nonhuman 4 priority journal 4 unclassified drug 4 Article 2 Bmal1 gene 2 C57BL mouse 2 Circadian rhythm 2 Cricetinae 2 Cytokine 2 Cytokines 2 Female 2 Joint 2 Joints 2 Male 2 Mammalia 2 Melatonin 2 Mesocricetus 2 Mice 2 Mice, Inbred C57BL 2 Mice, Knockout 2 Motor Activity 2 Murinae 2 N-nitrosomelatonin 2