Effects of acute cold exposure at night on pineal N-acetyltransferase activity and melatonin content in white-footed mice, Peromyscus leucopus

Michael G. Tannenbaum, Gale R. Haigh, Mary K. Vaughan, Russel J. Reiter

Research output: Contribution to journalArticle

2 Scopus citations


1. 1. Pineal N-acetyltransferase (NAT) activity in long-day white-footed mice (Peromyscus leucopus) exposed to cold soon after onset of darkness was depressed relative to controls, whereas mice exposed to cold later at night had slightly elevated enzyme activity. 2. 2. NAT activity in short-day mice exposed to cold soon after lights off did not differ from controls. Pineal melatonin in these mice, however, did not rise, as it did in controls. 3. 3. These results suggest that acute cold exposure may modulate NAT activity, which is controlled primarily by the L:D cycle.

Original languageEnglish (US)
Pages (from-to)363-366
Number of pages4
JournalComparative Biochemistry and Physiology -- Part A: Physiology
Issue number3
Publication statusPublished - 1990


ASJC Scopus subject areas

  • Physiology

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