Pineal rhythm of N-acetyltransferase activity and melatonin in the male badger, Meles meles L, under natural daylight: Relationship with the photoperiod

: The rhythmicity of melatonin secretion and of pineal NAT activity was compared in male badger kept in natural daylight during two distinctly different photoperiods (January and June). The hormone and its enzyme follow the same pattern with a nighttime elevation and a low level during the day, demo...

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Veröffentlicht in:Journal of pineal research 1991-09, Vol.11 (2), p.80-85
Hauptverfasser: Charron, G., Souloumiac, J., Fournier, M.C., Canivenc, R.
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container_issue 2
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container_title Journal of pineal research
container_volume 11
creator Charron, G.
Souloumiac, J.
Fournier, M.C.
Canivenc, R.
description : The rhythmicity of melatonin secretion and of pineal NAT activity was compared in male badger kept in natural daylight during two distinctly different photoperiods (January and June). The hormone and its enzyme follow the same pattern with a nighttime elevation and a low level during the day, demonstrating the presence of a nyctohemeral rhythm. The high correlation found between the NAT activity and the melatonin concentration suggests that NAT is the rate‐limiting enzyme in melatonin synthesis in the badger. Peak amplitudes were similar under the two photoperiods. Melatonin secretion occurred in the first part of the night irrespective of the photoperiod. The rhythm of melatonin secretion is modified by the photoperiod. The duration of high nighttime levels varies; it is longer (8 h) when the night is long (16 h) in January, and shorter (6 h) when the night is short (8 h) in June. In the badger, differences in the duration of high level melatonin at night may reflect variations in day length and convey to the animal the photoperiodic information.
doi_str_mv 10.1111/j.1600-079X.1991.tb00460.x
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The hormone and its enzyme follow the same pattern with a nighttime elevation and a low level during the day, demonstrating the presence of a nyctohemeral rhythm. The high correlation found between the NAT activity and the melatonin concentration suggests that NAT is the rate‐limiting enzyme in melatonin synthesis in the badger. Peak amplitudes were similar under the two photoperiods. Melatonin secretion occurred in the first part of the night irrespective of the photoperiod. The rhythm of melatonin secretion is modified by the photoperiod. The duration of high nighttime levels varies; it is longer (8 h) when the night is long (16 h) in January, and shorter (6 h) when the night is short (8 h) in June. 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The hormone and its enzyme follow the same pattern with a nighttime elevation and a low level during the day, demonstrating the presence of a nyctohemeral rhythm. The high correlation found between the NAT activity and the melatonin concentration suggests that NAT is the rate‐limiting enzyme in melatonin synthesis in the badger. Peak amplitudes were similar under the two photoperiods. Melatonin secretion occurred in the first part of the night irrespective of the photoperiod. The rhythm of melatonin secretion is modified by the photoperiod. The duration of high nighttime levels varies; it is longer (8 h) when the night is long (16 h) in January, and shorter (6 h) when the night is short (8 h) in June. In the badger, differences in the duration of high level melatonin at night may reflect variations in day length and convey to the animal the photoperiodic information.</description><subject>Analysis of Variance</subject><subject>Animals</subject><subject>Arylamine N-Acetyltransferase - metabolism</subject><subject>circadian and circannual rhythms</subject><subject>Circadian Rhythm</subject><subject>Male</subject><subject>Mammals</subject><subject>melatonin</subject><subject>Melatonin - metabolism</subject><subject>N-acetyltransferase</subject><subject>Periodicity</subject><subject>pineal gland</subject><subject>Pineal Gland - enzymology</subject><subject>Radioimmunoassay</subject><subject>Sunlight</subject><issn>0742-3098</issn><issn>1600-079X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1991</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqVkctu1DAUhiMEKtPCIyBZLFg1w3Gc2E4lFqjQUjQMowIqO8tJThoPuWE77eRNeFwSZlSWCMvysfRfzuILgpcUlnQ6r7dLygFCEOn3JU1TuvQZQMxhuXsULB6kx8ECRByFDFL5NDh2bgsAUkp-FBxRkYjpuwh-bUyLuia2Gn3VkK4k61Dn6MfaW926Eq12SHTuzZ3xI9FtQRqste9a05Lp-gpJo2skmS5u0Z6ST1ijmz3TuzolQ1ugJa32g522FHqszW3lz8j1XGK61lWmJ_fGV3-a-qrzXY_WdMWz4Empa4fPD_Mk-Hbx_uv5h3D1-fLq_O0qzGMmIOQaWBLxHLKYFUyWaZnkWiZlIbmEmGYJK3lRRkLkucgAkUaC5SkvqWQgBUvYSfBq39vb7ueAzqvGuBzrWrfYDU6JKOExTdk_jZTzOImTdDKe7Y257ZyzWKremkbbUVFQMz-1VTMkNUNSMz914Kd2U_jFYcuQNVj8je6BTfqbvX5vahz_o1l93FxJmPLhPm-cx91DXtsfigsmEnWzvlQXmy_r9ObdtQL2GwelvFE</recordid><startdate>199109</startdate><enddate>199109</enddate><creator>Charron, G.</creator><creator>Souloumiac, J.</creator><creator>Fournier, M.C.</creator><creator>Canivenc, R.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TK</scope><scope>7X8</scope></search><sort><creationdate>199109</creationdate><title>Pineal rhythm of N-acetyltransferase activity and melatonin in the male badger, Meles meles L, under natural daylight: Relationship with the photoperiod</title><author>Charron, G. ; Souloumiac, J. ; Fournier, M.C. ; Canivenc, R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4370-6a03526c0b43d38f9f5ca85fd868041b53f6df277cc7b0ee1273c96f183087353</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1991</creationdate><topic>Analysis of Variance</topic><topic>Animals</topic><topic>Arylamine N-Acetyltransferase - metabolism</topic><topic>circadian and circannual rhythms</topic><topic>Circadian Rhythm</topic><topic>Male</topic><topic>Mammals</topic><topic>melatonin</topic><topic>Melatonin - metabolism</topic><topic>N-acetyltransferase</topic><topic>Periodicity</topic><topic>pineal gland</topic><topic>Pineal Gland - enzymology</topic><topic>Radioimmunoassay</topic><topic>Sunlight</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Charron, G.</creatorcontrib><creatorcontrib>Souloumiac, J.</creatorcontrib><creatorcontrib>Fournier, M.C.</creatorcontrib><creatorcontrib>Canivenc, R.</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Neurosciences Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of pineal research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Charron, G.</au><au>Souloumiac, J.</au><au>Fournier, M.C.</au><au>Canivenc, R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pineal rhythm of N-acetyltransferase activity and melatonin in the male badger, Meles meles L, under natural daylight: Relationship with the photoperiod</atitle><jtitle>Journal of pineal research</jtitle><addtitle>J Pineal Res</addtitle><date>1991-09</date><risdate>1991</risdate><volume>11</volume><issue>2</issue><spage>80</spage><epage>85</epage><pages>80-85</pages><issn>0742-3098</issn><eissn>1600-079X</eissn><abstract>: The rhythmicity of melatonin secretion and of pineal NAT activity was compared in male badger kept in natural daylight during two distinctly different photoperiods (January and June). The hormone and its enzyme follow the same pattern with a nighttime elevation and a low level during the day, demonstrating the presence of a nyctohemeral rhythm. The high correlation found between the NAT activity and the melatonin concentration suggests that NAT is the rate‐limiting enzyme in melatonin synthesis in the badger. Peak amplitudes were similar under the two photoperiods. Melatonin secretion occurred in the first part of the night irrespective of the photoperiod. The rhythm of melatonin secretion is modified by the photoperiod. The duration of high nighttime levels varies; it is longer (8 h) when the night is long (16 h) in January, and shorter (6 h) when the night is short (8 h) in June. 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source MEDLINE; Access via Wiley Online Library
subjects Analysis of Variance
Animals
Arylamine N-Acetyltransferase - metabolism
circadian and circannual rhythms
Circadian Rhythm
Male
Mammals
melatonin
Melatonin - metabolism
N-acetyltransferase
Periodicity
pineal gland
Pineal Gland - enzymology
Radioimmunoassay
Sunlight
title Pineal rhythm of N-acetyltransferase activity and melatonin in the male badger, Meles meles L, under natural daylight: Relationship with the photoperiod
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